Mister Grumpy wrote:

Exactly! The whole assembly is flush with the cockpit sole. The
cover is male, threads into the frame. Nothing to grab onto at all,
except the two little holes (1/4" deep) for the spanner. I've thought
of drilling the cover so I could get a good grip on it but then I
would have a cover with holes in it, and I don't know where I could
ever get a replacement (it's 1976 vintage) -MG

If the emergency rudder cover plate is anything like the smooth, flat one
on the Mirage 33 I sail on, this tool may not be able to grip the edges.

Drill out the small holes with a larger bit so you can get a better grip
with a different spanner wrench with larger pins. Tap the holes with pipe
threads (1/8") and install pipe plugs once you have cap removed. Use Teflon
thread tape or pipe sealant that doesn't harden so the plugs can be removed
in the future.
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