e-bike controller box

A number of boxes designed for ebike motor controllers and wiring. Designed to be held together and in place with zip ties (up to 8 mm width).
DO NOT USE THESE IF YOUR CONTROLLER GETS HOT.
I am using a 250W 36V hub motor and the controller only gets slightly warm after a long climb.These designs all work although I am currently using the medium one (15x12x6cm) which exactly fits within the rear rack frame. The large one (16x12x6cm) was designed to fit on top of the rack and the smaller one (16x9x5cm) looked neat but lacks volume for excess wiring to be coiled insides. There is a 16mm hole for a push switch. I have included a design for a bracket to help mount the medium box against rack rails