Nope. Since I left the reed valves in, I figured I wouldn't need it. I did take the reeds themselves out as the screw protruded a bit and these plates are flat, not recessed on the underside.
Since the reed 'carriers' have gaskets, and they weren't cracked or brittle, I didn't use any sealant.
Oh jeeze! Leaving the reed valves and Dubious Chinese Knockoff Levers? Just an accident waiting to happen, my friend! Big fiery explosive accident! :laughing6-hehe: