"Also I screwed the pin in an etra turn to shorten the gap between cocking piece and rear of the bolt. This reduced the play between the stud of the cocking piece and the retracting cam surface of the bolt, now the bolt could not kick up nearly as far if it did become loose again. A single extra turn cut the play in half."
Oops, if you screw the firing pin in one extra turn, then the cocking piece will hit the rear of the bolt. Forward travel of the firing pin is to be stopped by the collar of the firing pin hitting the rear of the bolt head. (Bolt head timing controls the gap between the cocking piece and the rear of the bolt body)
Your reducing bolt jump by letting the cocking piece hit and drag on the rear of the bolt and thats a NO NO!
Any other Bubba suggestions on how to mess up a perfectly good Enfield rifle.