--"If your hinge gaps are not sealed, seal them. That alone could greatly increase your control surface's performance."

--"They should really only be wide enough to slip a sheet of notebook paper through."

I have been using a T-pin as a means of spacing the gaps to prevent CA from leaching along the length and binding the control. Maybe 1/32". Doesn't the leading edge need enough clearance to allow easy movement as the small flat where the hinge line is cut butts up against the main wing/stab? Or do I need to bevel the edge down to as sharp a point as possible? I usually leave about 1/8" flat to support the CA hinge.

Does the covering need to be top and bottom or would sealing the bottom only with a flap of covering help?