HELP - Emaxx Strobe Slipper Q's

Just about to get my 9xl setup up and running, but I had a few quick questions. :032: I see the strobe kit and ofna spur do not come with screws. What size screws need to be used to mate the spur to the slipper. Also - that hex drive into the transmission on the Emaxx, is it supposed to fit into the bearing of the slipper -- IE hex plate, metal disk, slipper (with pads), metal disk, finally hex plate? Also how tightly should it be set? Thanks all. Hoping to at least getting putting around this weekend.:027: