5mm motor spool

My daughter, her friends and myself have having a blast with @271828's Pull String Helicopter. But I had to see if I could take it up a notch. I have a bunch of 2204/2205 brushless motors and ESC's laying around so figured a powered version would be fun.

Since 271828 was kind enough to share his solidpart files I was able to open the hub in Onshape and remove most of it, then add a 5mm hole in the center and an opening sized to fit the nut on this particular motor (it's NOT sized to fit a s