Fortunately, I was able to re-design the yaw motor mount. I designed the part originally from the Amazon description of the worm gears that I used...and I messed up the dimensions. Didn't figure it out until I had printed the main box for the project. Fortunately, I left some wiggle-room in the box so that I can just tilt the motor 7 degrees and fix spacing problem. Planning to print/verify the fix tonight.