"PVR" wrote in message
...
The boards are 5/8" and are grain printed. I take your point about using a
non aqueous glue. I thought about using a spline but the grain print
surface might be too delicate to go though my router. Some experiments are
in order before I start construction.

Use a slot cutter and either slick your router specially fine to avoid
scratches, or doublestick the visible surface TIGHTLY to a piece of ply
and pass the router over that. Or that past the table-mounted router, but
I'd say your dimensions favor the former.

Make sure the doublestick doesn't lift the pattern.