About this 3D model

Having just built my first 3D printer, the VORON CoreXY, I wanted a somewhat portable place for it to sit. I bought some wire shelves, casters, poles, and thought I was ready to go. Unfortunately, the poles came unfinished and I had no way to attach the casters to the pole(no wheels, man!). Being brand new at 3D printing and design, I decided that making a caster insert for the poles would be a great first project and a perfect use of a 3D printer. I got busy with Autodesk Fusion360 and created this. The caster support will fit a standard 3/8" threaded caster and a 1" OD wire shelving pole. The first 5.31mm printed 0.2mm layer height, 90% infill. The rest print 0.3mm laer height, 35% infill.