[paulcomi]

Bob, I like this jig a lot. That is as long as the plywood bit that's being used is truly the same thickness as the plywood that is actually going into the slot. Is it your experience that veneer ply is truly 23/32? or is it even thinner-like 22/32?

I just bought a couple plywood sized bits at Rockler this week. I used a 23/32 to cut a dado using a 1 runner sled with my router table and was using some secure hold downs to prevent the stock from sliding around. I found the dado joint was too loose when I slid the stock into the dado. When I measured the thickness of the plywood I found it was 22/32 instead of 23/32 and that 1/32 is a lot when building something. The ply I bought was oak veneer plywood that I got at my local Home Depot.

 

[paulcomi]

With the unpredictability of the stock in mind, it would be slick to still use a bushing as the guide for cutting slots but incorporate a width adjustment somehow. If one could lock the jig for the width of the stock and then cut the slot running the bushing against the edge one way and against the other edge on the way back it would still be an improvement over the trapped base jig idea

 

[paulcomi]

That jig idea but using a rub collar as opposed to bumping the base against fence walls would lock in the exact thickness of various widths of stock.