If the film gate wraps down into the film spool wells, as it does on some of my folders, it might well be one-time hardware. I was able to remove the gate, and subsequently the bellows, in my Wirgin Auta, but haven't been able to get either one out of my Speedex 4.5 (which is a close cousin of that Ventura); it seems to be secured by the tripod socket, of all things, and I haven't seen any way to move the socket; it looks as if it was cold drop forged in place! Which was most annoying, since if I could get the bellows out, I'd buy a Speedex Jr. for the better bellows to put behind this decent Agnar lens and finally get some good use out of this camera -- and then have a 6x6 film transport to put a pinhole on...