I'm learning bass trombone just now - well trying to! The main problem I'm experiencing at the moment is holding the thing. Is it acceptable to rest it on the shoulder or should the left hand bear all the weight? I'm finding that my thumb is taking most of the weight and so I can't hold it for more than a couple of minutes at a time - plus this means I shift the weight a bit to use the triggers, which seems very wrong! I've looked on the internet and read some books and I can't really see how to hold it any differently. Does anyone have any tips? (Other than go to a teacher which I think I will do - but until then I need to learn the dots and it's slower when I can't play it for long at a time).