I wandered up to the big city today and kicked some fenders. Gray and cold but scarely any precipitation. Saw mebbe three dozen boats. Some flat sliders were on custom fabricated extrusions, some in plastic channels screwed to the cabin top, some on square tube aluminum. Looking at all the hatches in general there were myriad ones to choose from.

Wandered up to Schooner Creek and chatted up Steve. Got his style for sliding in teak rails described to me. The boat I'd seen at the local show was in another area so I couldn't see it.

All in all, I have two possibles within the context of my boat. The DDW way, which enables me to alleviate the slight lack of parallelism in the rails but needs a fully built turtle top to attach to the cabin top.

Or, the teak slider channel type which needs two more rails installed of teak but enables me to build the turtle cover right on the teak rails, which looks simpler to me.