I have a 'basic' question, if I may... I know very little about these matters, but I know who to ask, and that counts;-)
I'm easily lost in the multi-vendor alphabet soup, but is it in fact true that the only practical way to operate Malkoff M61 modules (SHO, N, etc.) [without modification / machining] in an Elzetta Bravo body / tube is / was by using a now-defunct (discontinued) bit of hardware referred to as a "ZFL head"? If so, I guess that's bad news for me, as I gather those don't exactly grow on trees anymore. You can break it to me straight though, as I don't usually shoot messengers;-)
Thanx for any enlightenment / info you might be able to provide!