Quote Originally Posted by Neil Miller
Hi Joe,

This diagram might help...

wetplate back diagram

It looks like a half bullnose slat of timber is used, set against something springy, that locates into a partial groove made on the far side of the darkslide. It seems like some of the downward slope of the bullnose is left in the channel so that the darkslide can push it aside when reinserted.
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Neil
Neil,

Thanks for the link to that diagram. It looks like it would be simple to construct and it should work. A weak compression spring or maybe something like compressible foam rubber in the rear of the thing might be sufficient to allow the movement in both directions.

Thanks again for the tip.

Joe