seconds page first photo, original over and reworked under.
I drilled few holes on trigger frame and welded them with mig. I put new frame because I made new trigger consept, you can see sketch under new frame. Two stage, adjustable, with very light pull,,at least I hope so. Without main spring pressure it works fine so far.
Piston seal, for example CF20/30 has this kind of seal (same I used). You can see there are many model with this seal (25,xx? mm diameter), same seal number (12540) same seal.
http://www.sermasports.com/PRODUCTOS/carabinas_gamo/despieces_gamo/1-menu-planos-carabinas-gamo.html
Seal needs some "custom"-made collar or screw, it's inner diameter is cone shape.
Breech plug was threaded overtight, with "one more round"-method after enough, no factory glue. It's no fixed with plug weld, I'm not going to remowe it anymore.
Original transferport plugged with M8 bolt and soldered with tin.
