At the Midlands Model Engineering Exhibition last year I had a chat with a helpful gentleman on the Machine-DRO stand. While they do not do a kit specifically aimed for the WM16, they do a kit for the Chester Champion 20V mill, which is basically almost identical.
Anyway, I ordered the kit at the show 10% discount. I had no real problems fitting the kit to the Warco mill, and have been very pleased with it. Some pictures below. The X-sensor is fitted to the front of the table, so there is no loss of Y travel. I think there may be about 10mm loss of X travel to the extreme right due to the Y sensor assembly fouling the X winding handle at the extreme right travel – not an issue for me because the opposite end handle hits the shop wall to the right of the mill first!



Emboldened by this, I later asked whether the kit for the Chester DB10 lathe would fit the WM250 lathe. I was told that it would (but there are 2 variants for different cross-slide designs). Conclusion is that it does fit, and I am very pleased with that kit also! (I did not like the offering I saw once at the Warco sales area, as the cross-slide sensor on that badly obstructed travel of the tailstock towards the headstock end, causing reach problems using a drill in the tailstock chuck. Hopefully Warco have changed that by now). I shall sort out the photos for this later.
Hope this helps
Martin