Ergonomic grip for the Sony a1 remote

This is a replacement for the back cover of the sony A1 TV remote control. Normally the remote control is very symmetrical, and often when you take it in your hand, you take it in the wrong direction. This grip adds a double convex effect (as in the logitech harmony remotes). It can be printed in 2 parts and glued (or fixed with M3 screws of various length) or all in one piece with appropriate supports, better if soluble.