Would you have a list of all the O-ring sizes used in the rifle? It would be great to include this "most basic" information.
Also, if you would have any information on the length and thread of the screws used in the gun, I think that would be 2nd most valuable, so if one strips a guy can get one locally.
And a selfish question...would you happen to have a multishot breech and magazine?
As for your parts situation for critical stuff like valves, poppets, springs, etc, do you plan to continue stocking these or are you just selling them to depletion?
And if there is anything specific you wish I would include based on customer needs and feedback, just let me know, we will work it out.