I will need to attach a tab for a tinnerman to a steel tube without welding. I need to drill a screw hole in the steel tube that makes up the forward arch of the turtle deck. To this I will attach a small tab to mount the new larger headrest. My question is which would be better, a hole parallel to the longerons (front to back) or from the outside of the curve (in towards the center) of this arch. This arch is not a roll over support and not really a structural member other than to hold the stringers going aft. Or am I worried about nothing? The tube is 3/8", the hole will be for a #4 or #6 screw.
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