HiGreat pictures! I modified my HW40 a bit over the last year.-2 seals on the piston-Trigger-Removable, adjustable and 3D printed shoulder restNext mod will be the barrel. Can someone provide me a part number, and maybe a good shop which shippes overseas, for a 10" .177 barrel I should use? Germany is not the best place to bus Crosman parts.By the way, where can I find the UC70D 116 seals and updates seals for the transfer port?Thank you,Michael
Last mod – PistonThis shows the original piston (minus cheap oem o-ring):The mark on the piston is how far it comes out of the cylinder at the end of the intake stroke… that established the location for the back of the oil wick groove.Groove is cut .120” deep and .250” wide:The felt is .125” thick F-3. Cut to 5/16” wide it was a really tight fit in the groove:Last thing is the now famous “diametrically channeled shim”… and a better o-ring (UC70D 116):The shim is .033” thick JB Weld and coated with cyanoacrylate. All this for a pistol that cost $7.50…Wyo
WyoMan, your "Twin File Lathe" is genius!I can not tell from the pics, are the nuts and threaded rod attached to the file, if so how? Am I assuming correctly that the nuts need to be the same as your desired final OD of the work piece (or a wee bit smaller assuming you can shim them to final size)?Sometimes when I think I am clever, I see things like that and say, nope, I'm on the wrong side of the bell curve.