I had thought of drilling an array of tapped holes in lieu of the
T-slots but came up with something a bit more flexible.  I had acquired
some tooling plates that were perforated with holes exactly the right
size for tapping 1/4-20 or 6 x 1 mm (for Unimat accessories).  I took a
piece of this plate and squared it so it can be located accurately using
the fences.  Then the edges of the perforated plate act as additional
part alignment features and the tapped holes can be used for clamping in
almost any location.

Obviously not something the guys repairing tractors need but a very
handy tool if one is making small models or miniature engines.