IIRC, the height-limiting bit was the lip at the forward end of the companionway. Which is also the stop that the aft end of the hatch runs into when fully open. So another solution that might work with a flat square hatch is to make the forward rail removable. Put the hatch in place, push it over the lip, then screw the front on in-situ. I don't remember exactly why I didn't do it that way, except I wanted a bullet-proof one-piece hatch that I could jump up and down on if needed.
Come to think of it, one might also achieve this by unscrewing the stainless slide rails during installation.
Come to think of it, one might also achieve this by unscrewing the stainless slide rails during installation.
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