We have been using the shaft collar and it is pretty inconvenient to have to screw the small screws inside and then being “stuck” to the screwdriver when done screwing and is causing problems. In the Vex competition, are we allowed to use the vex screws we used for kep and nylon nuts and other nuts instead of those small screws that are with the shaft collar? It works perfectly but I am not sure of the legality.