[Talonmotorsport]

Don't worry I'll work out who is who.

The drilling and tapping of the upright is not to stop the mushroom from spinning,theres very little chance of that by the time you've done the pinch bolt up with 60-100lbs of force. The idea is to keep Mr. VOSA happy in case your silly enough not to check every nut and bolt before driving it at 70mph+.