Quote Originally Posted by Dornfelderliebe View Post
The piston in question which I broke a tap in and is now with Meden vale engineering to put right, already has the slot lengthened.

It is the victim of the worst case of piston lightening ever perpetrated but I'm hoping it will be ok with .177.
Your next problem with the Airsporter may be that of running out of leverage. The underlever will hit the trigger guard before the sears lock up