Originally Posted by sosidge

If all you want to do is run a square pack, 54605 A parts is all you need. Bear in mind that if you run a standard servo you will need to find a couple of m3x18 screws. No need for the new motor mount.

I have my doubts over the benefits of the new arms beyond simplicity, I haven't heard anything good about the droop screw implementation and you will need to find loads of hardware to run the droop screws anyway.