I will be installing a Tiller Mate on my H26. I have to install a small cleat on the tiller. I may be able to install it near enough to the end of the tiller that I can simply use a bolt and nut. BUT, if I can't , I'll have to screw it onto the tiller. Should I tap a hole for the screw or simply use a self-tapping screw? Any advice will be appreciated. Thanks! BrianW