Linear castors

I wanted to come up with some linear castors for a pull out shelving unit, castors were rotating on their axis and getting stuck.I had some 608 bearings in my maker box so decided these would be my “wheels”, we all know wheels need tyres so I knocked up some TPU tyres.These can be quite fiddly to get on - the tolerances are tight, if you push the bearing in perpendicular to the “tyre” then use two flat surfaces either side of the bearing and tyre and press them together the bearing pops in.I then needed a mount and an axle, given I didn't have any 8mm tube or rod I decided to print some.The Axels are much longer than required, I wanted extra in case I snapped or damaged it hammering through the mount and bearing. I used Tinmorry 95A TPU for the tyres and Tinmorry PETG-CF for the mounts and axles. This is my first upload to Maker world please let me know what you think!