Threaded mounting flanges to replace the lower nut.

I have 4 different types of mounting flanges to suit the needs of many hobbyists. Each one is a different height with a slightly different look. They were remixed from these two items: https://www.thingiverse.com/thing:3419756 & https://www.thingiverse.com/thing:1261794. The first link is my remix of a two hole flange. It was modified to have 4 holes. I have included 123D Design files along with STL files.