Now anyone can pull-start any engine !

[jdurand]

Thanks for that - may be a way to go if I get a few units sold

Works very well if you keep the design simple. About 20 years later I added a DRO to the mill which helped immensely on larger items with several hole sizes. First you don't have to worry if you turned the crank 100 times or 101. Second REALLY helpful is when you are making holes in something longer than your milling range (mine has a 500mm X range). Make one batch of holes, slide the item town, zero off one of those holes and make the others. Might be a tiny bit off but for what I do a couple of fractions of a mm don't matter.