The $100 challenge.....

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   Hi Kiwi, I think that's referred to as the main guide. The top hat sits on the opposite end of the spring that sits inside the piston. Have a look at the tinbum tuning kits and install videos and this will explain in further detail. 

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jwabfrog Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 12 Nov 2021 Location: Thames Status: Offline Posts: 142	Post Options Post Reply Quote jwabfrog Report Post Thanks(0) Quote Reply Posted: 03 Sep 2023 at 3:45pm
	Hi Kiwi, I think that's referred to as the main guide. The top hat sits on the opposite end of the spring that sits inside the piston. Have a look at the tinbum tuning kits and install videos and this will explain in further detail.

KiwiTR6 Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 03 Nov 2022 Location: Stratford Status: Offline Posts: 282	Post Options Post Reply Quote KiwiTR6 Report Post Thanks(0) Quote Reply Posted: 03 Sep 2023 at 3:20pm
	Thanks jwabfrog and apologies guys, I've removed this incorrect piece of info to save any future confusion Edited by KiwiTR6 - 03 Sep 2023 at 6:55pm
	FX Wildcat MK111 BT Sniper .25 FX Dreamline Classic .22 Diana Outlaw .22 Cometa Fenix 400 .177 Weihrauch HW50 .177 Crosman 2240 PCP Custom .22 Crosman 2250 PCP Custom .22 Brocock Grand Prix .22

RangerPete Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 18 Apr 2023 Location: Cambridge. Status: Offline Posts: 884	Post Options Post Reply Quote RangerPete Report Post Thanks(0) Quote Reply Posted: 03 Sep 2023 at 1:55pm
	Excuse my ignorance, but what is a top hat (I’m guessing it’s not something that goes on your head), and what does it do?
	Walk quietly, but carry a big stick.

KiwiTR6 Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 03 Nov 2022 Location: Stratford Status: Offline Posts: 282	Post Options Post Reply Quote KiwiTR6 Report Post Thanks(0) Quote Reply Posted: 02 Sep 2023 at 10:14pm
	I was considering using an O-0ring but now that I have the PTFE I'll try that first and see how it goes. Same with the sleeve, it's reasonably easy to set up vs buttons although that may change if the thinner sheet still doesn't allow the spring to move as freely as I want. If that's the case then I'll make a new top hat and install some buttons.
	FX Wildcat MK111 BT Sniper .25 FX Dreamline Classic .22 Diana Outlaw .22 Cometa Fenix 400 .177 Weihrauch HW50 .177 Crosman 2240 PCP Custom .22 Crosman 2250 PCP Custom .22 Brocock Grand Prix .22

J-S Members Profile Send Private Message Find Members Posts Visit Members Homepage Add to Buddy List Senior Member Joined: 19 Oct 2014 Location: Auckland Status: Offline Posts: 425	Post Options Post Reply Quote J-S Report Post Thanks(0) Quote Reply Posted: 01 Sep 2023 at 12:11pm
	Looking good. 600ish fps is probably a good velocity to use an o ring as piston seal - make a small piston head from the polymer to secure to the front with a groove for an o ring to fit snug but not too firm inside the compression tube. Also could make some buttons out of the same material to add to the back of the piston then it should be very smooth. PTFE sleeve could be omited if you use a well fitting tophat inside the piston/spring to keep the spring firm and a firm fitting rear guide.
	J S Airguns Air Arms TX200('s) Theoben Sirocco HW77 FWB 300s Webley Patriot One or two others... Current projects: Too many..

KiwiTR6 Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 03 Nov 2022 Location: Stratford Status: Offline Posts: 282	Post Options Post Reply Quote KiwiTR6 Report Post Thanks(0) Quote Reply Posted: 31 Aug 2023 at 8:58pm
	Paul I'm doing exactly the same as you, learning as I go - YouTube is such a great resource. Started on Stage 2 tonight but didn't get very far. I'd sourced some 0.5mm PTFE sheet from my friends at AliExpress but I failed to take account of the fact that the piston is swaged in at the centre so it's too snug a fit on the spring. I can get it in without too much effort but it's not free to slide as it should so I packed it in early. Went inside to the warmth of the fire and placed an order for some 0.3mm sheet and several short rods of various diameters. I should clarify that whilst I'm buying this stuff for this project, it's also workshop stock for my multitude of other retirement projects (when I finally get to them). I plan to make a new seal out of the same stuff but I'm thinking I need some other material in the centre of it to absorb the shock as I don't think the Teflon will handle it for long. The factory seal is pretty bad so I definitely need to replace it with something.
	FX Wildcat MK111 BT Sniper .25 FX Dreamline Classic .22 Diana Outlaw .22 Cometa Fenix 400 .177 Weihrauch HW50 .177 Crosman 2240 PCP Custom .22 Crosman 2250 PCP Custom .22 Brocock Grand Prix .22

Pauly5 Members Profile Send Private Message Find Members Posts Add to Buddy List Forum Moderator Joined: 10 Mar 2013 Location: Titahi Bay Status: Offline Posts: 1411	Post Options Post Reply Quote Pauly5 Report Post Thanks(0) Quote Reply Posted: 31 Aug 2023 at 6:44pm
	I love what you've done with the trigger. This has been a great thread so far, as it has brought out some great thinking from everyone. You give me too much credit Kiwi, I am really only regurgitating what i've learnt from others.

KiwiTR6 Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 03 Nov 2022 Location: Stratford Status: Offline Posts: 282	Post Options Post Reply Quote KiwiTR6 Report Post Thanks(0) Quote Reply Posted: 31 Aug 2023 at 3:08pm
	Thanks Pete, but if you want to see some really impressive work take a look at the stuff Pauly has been doing!
	FX Wildcat MK111 BT Sniper .25 FX Dreamline Classic .22 Diana Outlaw .22 Cometa Fenix 400 .177 Weihrauch HW50 .177 Crosman 2240 PCP Custom .22 Crosman 2250 PCP Custom .22 Brocock Grand Prix .22

RangerPete Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 18 Apr 2023 Location: Cambridge. Status: Offline Posts: 884	Post Options Post Reply Quote RangerPete Report Post Thanks(0) Quote Reply Posted: 30 Aug 2023 at 8:50pm
	Wow Kiwi, that’s some impressive work you’ve done so far. I’m looking forward to seeing what Stage 2 has in store 👍🏻
	Walk quietly, but carry a big stick.

KiwiTR6 Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 03 Nov 2022 Location: Stratford Status: Offline Posts: 282	Post Options Post Reply Quote KiwiTR6 Report Post Thanks(0) Quote Reply Posted: 30 Aug 2023 at 8:43am
	Shimming the breach got rid of the awful slop, but I used a single piece of 8 thou shim as it was quicker to do but probably not ideal for alignment. I also grabbed some 4 thou at the same time which I may yet use on each side to keep the barrel central. However, given the pretty rough machining from the factory, it may not be aligned properly anyway I didn't notice any improvement from doing this, but the difference in the trigger is night and day.
	FX Wildcat MK111 BT Sniper .25 FX Dreamline Classic .22 Diana Outlaw .22 Cometa Fenix 400 .177 Weihrauch HW50 .177 Crosman 2240 PCP Custom .22 Crosman 2250 PCP Custom .22 Brocock Grand Prix .22