Right now I've been doing ground work/prepping for riding with him in a loose ring french link snaffle [have also tried 2 other single jointed snaffles in the past] but I have a feeling it's not working for him - he doesn't complain [except for taking the bridle on & off, which I'm not sure is even connected to the bit or not, either way we are working on it], but he does have a really low palate as well as quite a thick tongue and there is something about the way the bit sits in his mouth that I don't like [almost looks like the link jabs him in the top of his mouth?], as well as it pinches his lips pretty badly.
Does anyone have any suggestions or advice? I've been doing lots of research, but there are SO many different types of bits and it just confuses me. If you need anymore info, let me know!