So back to the sliding dove tails this morning. The board I was working on yesterday has been consigned to the designer fire wood pile, might be able to salvage a little bit for odd things but the slot is shot.
So machined up a new bit, cut the groove, and then with the dove tail bit very securely tightened in the collet, I managed to machine the 2 boards without incident.
Next I had to cut the tail on the glued up boards. I did not touch the router, figuring if I left the height as it was the resulting tail should match the groove. I reset the fence, best guestiment, selected a bit of scrap the same thickness as the panel and ran it passed the cutter, twice, once on each side. The result was much too wide, so I moved the fence and repeated the process, 4 iterations later I had a good fit.
I machined a tail on the prepared end of the board, fitted the bread board end on and then ran that against the fence on the table saw to get the other end of the board prepared, here is the result.
Needs trimming to width and a sand, should be a good fit.
There was nothing for it but to glue up the cabinet.
Not enough clamps of the right size, had major over hangs all round, could also have used more hands, I still think Zaphod had the right idea.
About to go and remove the clamps to see if its the right shape to continue working on.