Tuning Anyone have repair info for a Shinsung Career II 707?

Will Pratt is the go-to guy for these, but I am in Europe, and its not smart to send these guns across customs ( they might incorrectly think or feel these are illegal) so I had to do it all by myself. Turns out these guns are easy to repair, using youtubes and drawings. If you choose to do it yourself, I can help with o-ring specifications.

regards, Mike

PS nevertheless, Will does not just repair but also tune to your specs…