e-NABLE Fellowship - Karuna's Trumpet Holder - Hand & Gauntlet

I've started thinking about designs for the hand and gauntlet attachments for the trumpet holder. 
It's important to me that these components will fit in the bottom of the trumpet case, and be easy to take on and off of the mount with one hand... The hand will have the dovetail insert attached to it at the palm and will Velcro over the back of the limb.