Thank you for the advice, Aiden.
There is just now a full sheet of 19mm MDF stuck in the shed awaiting a good slicing. It'll be the basis for various Woodrat jiggery. I would have preferred a much smaller bit of MDF but the local supplier only does full sheets although they are inexpensive. I fact, I would have preferred HDF but no one around here seems to sell it.
I see that your advice to drill various Woodrat bits on which to mount jiggery makes sense. I intended to drill the aluminium jaws but perhaps a mounting point or three on the sliding member itself is also going to make a less wobbly jig. Today, though, I'll be sticking on a couple of metric scales and some pointers, as well as a small white-painted member on the top to make "Marks" on, as rubbing such marks off the aluminium is tedious-slow.
At present I'm making endless little boxes, amongst other things, which provides opportunity to put in stringing and banding of various kinds. I've been using a Veritas hand router with a double blade thingamy to cut the channels but fancy using the Woodrate to do the same, via some sort of carriage to hold up the box top or sides to a channeling bit.
All just play really. Other games might include a secret mitred dovetail, one by Woodrat and one by hand, as a learning experience only. (Does anyone actually use secret mitred dovetails in their furniture for some design reason)?
Incidentally, does anyone have a micro-adjust for fine control of the north-south movement of the router on it's plate in the Woodrat? At present I use their aluminium stopper in the T-track of the aluminium guide rails to limit forward travel, plus a feeler gauge for the fine changes ....... a bit of a cumbersome method and limited to feeler gauge thicknesses.
Eshmiel