Thanks, I have now sorted out that bit, although that only generates the drawing on the screen rather then the G-code but I am working through that now.
You might want to see a first trial of my MF70 conversion, with just a pen tapped to the side of the miller.

My ultimate aim is for small PCBs but I am working on automatic levelling correction at the moment as the Y axis tilts by about 0.2mm ever 40mm. I prefer to correct it by making corrections to the Z axis coordinates as I am more comfortable with that.

To Wobblybootie, it's never too late to learn. My wife does home tutoring for kids and I was discussing some mathematical formula with my son (on a visit home). One child overheard and apparently was amassed that this maths stuff was actually really used at work. By the way I spent a year living in Dorset (Weymouth) back in the 70s.
Thanks again for the support.