Hi, I have a private instructor for double bass/electric(we ahve been working our way over to double since there isnt really anything worthwhile to work on with my electric studies). Anyway I have been using a french bow, and he noticed today that my thumbs are weird. They are hitchiker thumbs that are almost paralel to the ground if i give a thumbs up. Anyway this is impeding in my ability to hold the bow correctly, the waythat he showed mewith my thumb bent inward through tbow. I can't seem to hold a french bow properly. Is there anyone with double jointed thumbs that have had problems like this before? My teacher said he has never seen that before. I was thinking that using a german bow may be better from what I have seen it used, with my thumb problem. But I have even less experience with german than I do french bow. I havent been playing DB for long, should I stick with french bow or should i confront him about playing german?