Many thanks for the input so far.

Boyan - the good news is that the table T slots are the same size as my manual mill, so I have all the usual clamping accessories to hand. My mill vices are however over sized, as the Novamill is much smaller. So I may need to invest in something more suitably sized.

When you say a "flay vice" what do you mean? Is that one where you essentially get two separate jaws, and use the table T-slots to set them any distance apart?

You also mentioned a 20x20cm tooling plate. The table on the Novamill is 360mm long x 120mm wide, and has a Y travel of 150mm. Does that change your suggested dimensions? I am particularly interested in how big to make this plate in relation to the table. Should the plate be bigger than the table, to allow clamping off the edge? Or is that overkill from experience?

Cropwell - they do look like useful items, and if I were to standardise on M6 fixings to a tooling plate, they could be a great addition.

Any more thoughts, especially on the tooling plate dimensions would be most appreciated. I realise I can make it any size, but I'm hoping for real world experience here!