Thanks for the ideas! I think that the smarter move for me as a green rider (regarding riding with a bit), and a green horse would be to stick with the simple choices at first and think about more complicated bits (elevator bits, waterfords, etc.) a bit later. I wouldn't want to start playing around with gadgets before I know whether my horse likes a double jointed snaffle or not. NBEventer, what you tell sounds good, and I suspect I will borrow a bit like this from a barnmate to try it out. My first training included some brainwashing how horrible every bit is, so I am still a bit vary and would like to overcome this feeling with the softest option - of course, being open to having to find what is the most suitable for my boy. I also think I'll go for copper or other sweet metal, that sounds like a good idea for a horse that used to associate bits with heavy hands and see-sawing to "teach contact".
I have come a long way, to surrender my shadow to the shadow of my horse.