Out with the three remote controls, in with the 3d printed daughterboard housing for the firetv remote. It contains an arduino nano, an IR LED, a lipo charger+battery, has 6 buttons (av receiver power, projector power, aux power, receiver input, vol up/down) and will clip onto the side of the firetv remote. Best trick up my sleeve: if you don’t press a button the arduino will take no current at all.
Primarily my private instance, but if you like the URL create an account. This instance is targeted at makers and software developers.