Wanted to share my GT2E mods here:
So the most obvious mods are wheel delete (unscrew, hotglue the hole), and AA battery holder delete (actually happened accidentaly at first fall and I liked it so much that I do it to brand new remotes as well now…) If you tap the bottom part to the ground it will likely just fall off in this exact same area. Could also just dremel it off, but that’s more work.
A 21700 battery is installed in the grip, this has practically infinite battery life, but as mentioned, battery indicator doesn’t work, so charge every few months for safety, (or possibly add some aliexpress battery indicator). USB-C TP4056 board wired up with the 4 wires as described, shoved into the bottom and covered up with hot glue. Ideally charge at only 0.5A (computer USB port).
Also kinda relevant, heres the GT2E vs GT2B ergonomics comparison.
TLDR E feels significantly better in hand (for me anyways)