This 1400 has languished in my parts bin for some years now, I'm wondering if it could be a candidate for a much more radical project.Here is roughly the concept I have in mind:The "blow open" idea and trigger are preserved, but the chamber and valve are moved in line with the barrel, and instead of a bolt the pellet is loaded via a sliding breech.This geometry should make it much more efficient, much less dead volume and with a balanced spool, the transfer port can match the caliber for greater flow without undue pressure on the trigger. Hopefully therefore I would be able to up the caliber to say 0.30" and still have useful velocity.