@Mr. Gandalf - I’m sure someone will chime in with some suggestions! The i6 is quite popular. The iA6 Rx that comes with it is quite small already. Why not strip the case and solder to the pins? I have an i6s Rx with the ia6b Rx which is bigger than the iA6, but when the housing is stripped off it is also quite small, with the benefit the pins are horizontal.