Hi Stuey,
I finally managed to find some time and installed the D26200. It is a robust and the weight is over 4KG yes I thought it will be 2.2kg as read in some website, my worry was will it fit in the d611 and would my x axis support the weight. Now that I have installed it is perfect and my first cut was uneventful.
I could move on x y and z axis through Easel but when it came to carving it did not recognise com port.
I had to restart my laptop and then it carved fine 
Dewalt D26200 costed 151UK pounds @ amazon.co.uk.
The head clearance is very tight but z axis moved up and down without any problem.
My first cut 4mm deep is a circle on 20mm thick pine wood with a v-bit and had no problem cutting.
Chandra