I found the reason. When I change 'RANGE=(0.5.0,1)' under '[ANIM_COMP_4] ; Arm2 deploy' to 'RANGE=(0.0,1)' the animations work fine.Do you have generic vessel ?
Lshft + numpad 1 for arms deploy. If you have a numeric keypad.
Yes you are correct on the child attach. I'll fix it. But the stow angle may not be correct. I didn't try it attached to the Dragon.