2nd Remix.
Remixed the original to work with a 5" i am building, seen some remixes which added more depth but not width and the original one would just about fit the width of my frame but was too tight to rest under the arms so just added 10mm to each side and worked perfectly.
When i added the feet underneath the motors i realised there was not enough depth and the arms were sitting on the lip instead of inside, so remixed again to add some depth as well as width.
Thanks to @Skyline989 for the original to work from.
Printed as is with supports 50% infill.
The author remixed this model.
Printed the original but it was just a bit too narrow to hold the arms on the 5" i am building. Nothing fancy but just widened by 10mm each side for a little more clearance and increased the depth by approx 10mm.