Thanks for the feedback on the arm length.
I personally feel that when the arms are cut up higher you lose the basic shape of the torso visually (does this make sense?). Another reason is when you have a decorative torso and epaulettes, longer arms can help balance out the all gold (by providing some plain red) otherwise all the trim can easily overpower the piece when its painted.
Anyway I realise its a personal thing, busts are strange and unnatural visually, I just wanted to post my thoughts
regards