Now that I can get the WD-641-PC roll bar bolted properly to the fuselage. I need to confirm that the roll bar sits square (or 90deg perpendicular) to the longerons. The only reliable way I can think of to get an accurate confirmation of square was to build a wood template. Using some MDF and scrap 2x2's I made a structure that would allow me to check the entire roll bar profile for level.
Fortunately the roll bar was quite square as is. I only was out about 3/32" at most at the very top. Just a small amount of finger pressure applied to the top of the roll bar brings it to square, so all I need to do is drill the WD-643-SS canopy brace accordingly rather than fabricate any shims.
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