Just to clarify, you mean from the biceps to the shoulder bell?
For the forearms, I don't think I have a lot of room to trim them because of the detailing on the back. I suspect if I can add strapping to keep my biceps up they won't touch.
Re the ab/belt tilt, I noticed that in the photos as well. I have scoliosis so my right hip naturally sits higher than my left, so I think that's probably why. I'm not sure I'll be able to do too much about it, but I'll see. It's not as pronounced in other photos so I think it's more of a dressing issue, or things shifting around.