Rick,
If your ambi is stainless bevel the top surface enough to get your blade between the frame and ambi w/o having to force the blade down...or,
Take a small pointed square file and make a vertical groove just in front of the ambi shaft on the ambi that a thin pointed instrument will fit down into the groove. That will pop it loose.
Also adjust the groove in the saftey shaft for a slightly looser fit...it isn't going anywhere with the right side grip in place and that will help to avoid the marring
.
[This message has been edited by bjg-1911 (edited 11-20-2001).]