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Bertram Moppie Project: Fixing Mistakes, Glassing Supports and Fairing A Custom Hatch Cover

August 31, 2025 · 19 min · 10K views

What this video covers

Andy corrects a structural error on a custom hatch cover for a Bertram Moppie project by removing and replacing an off-center stringer.3:32 After identifying that the original center stringer sat one inch off-center, he cuts a new, properly aligned support to ensure the hatch openings remain clear.4:28 He bonds the new stringer using Fix-O-Flex, a pre-thickened, flexible filler chosen to withstand vibration and shock.12:55 The fairing process involves multiple thin applications of fairing compound, using progressively wider trowels to achieve a consistent profile.9:49 Between applications, he sands the surface with 60-grit sandpaper to scuff the area and identify low spots, which appear as darker patches against the sanded, lighter surface.14:57 He also applies fairing compound to the port and starboard pockets to address minor gaps.16:02 Proper alignment and thin, layered applications of fairing compound minimize the need for excessive sanding.

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