Tweaks to FT 2020 i3 V-Slot E3D Extruder Mount

I like this straightforward design by iamquestar, All I did was make some of the holes blind to help out the bridging. So the two motor mount holes and the two hotend clamp holes have a 0.4mm bottom that will have to be cleaned out with a drill bit. Its easy to do and the bridging is cleaner.

I also added in a few supports in the motor recess so you don't need to have the slicer generate supports.

I did print it, but mine came out a little ugly because my extruder is giving me trouble (tha