custom D-bot bottom corner

This is a corner piece for the D-bot bottom corner vertices. It uses the parameterized corner piece here: http://www.thingiverse.com/thing:1543523

The original had 70mm of rail covered in each direction. I used I think 40mm instead. The original parameterized corner piece was monstrously large, so I trimmed it down to something more reasonable. I also made it so in each direction two screws were used instead of one in each rail slot.

The attached photos show this corner piece printed out in red eSun PETG and attached to my D-bot printer, and the remaining three photos show the original corner bracing that was put on the printer following the original D-bot plans. I was looking for a stiffer corner bracing for these corners that would also help with 90-degree alignment of the rails coming into the corner. This one-piece corner brace joins these rails into the corners with a nice tight joint that is much stiffer and stronger than the original bracing, and which enforces the 90 degr