Spindle Holder for Fully 3D Printed Small CNC Router/Plotter

Here is the spindle holder for the "Fully 3D Printed Small CNC Router/Plotter"

See PDF for print orientation. I used 4 perimeters parts.

Edit 9-6-19: The spindle Motor from Harbor Freight has a problem. The power is ok. The problem is the collet on this tool is not strong enough to hold the end mill in place. I was test milling on 1/8" acrylic. I was able to mill the acrylic with shallow depth of cuts and was pleasantly surprised at how well it was cutting. The problem was with holding the end mill in the collet. I was using a .073" dia. (.125" shank) single flute end mill. As I was running additional tests suddenly the mill would bury itself in the material. The end mill was pulling itself out of the collet. I tried to tighten the the knurled collet with pliers but it still pulled out. Then I managed to damage the locking pin that keeps the shaft from turning so it no longer locks. Time for a redesign using a tool with a better collet. My searches turned up cheap tools but many comments on cheap collets. Now I am looking at the Dremel Stylo 2050-15. It's 50 bucks. That's more than half of what I had in the whole build. Would be nice to be able to cut acrylic though. If you only cut soft material like machinable wax the HF tool might work.