Bowling Ball Rev Trainer

I had been meaning to create a bowling rev trainer for a while but never seemed to get around to it. I was inspired to do so when I came across a reddit post where someone designed and printed their own. They used 5/8" transfer bearings and I decided to use 1". What you'll need:7 Harbor Freight 1" Roller Bearings 7 M5x12 bolts7 M5x20 bolts14 M5 nutsThe metric hardware I used came from this kit, but you can use whatever you'd like. Also the other rev trainer that inspired me to design this one is here if you'd like to weigh your options. Any feedback is also appreciated!