Arcade Spinner Steering Wheel Attachement

I have been spending a cold winter building an arcade unit. No style, lots of substance. Picked up a Spintrak arcade spinner for Arkanoid, Warlords, etc but did not want to drop the 70 USD for a stearing wheel accessory. Prints in three pieces and uses nine 4-40 X 1/2 sheet metal screws and nuts to hold it all together.

The three screws that hold the nut to the bottom are too long, so you can get away with shorter screws there.

Mine friction fit onto the dial but I can see that failing