Points taken and comments noted.
I've played about with various plastic so called drill grinders with limited success but with more failures than can be admitted. In others words, I'm an idiot
Even if these drill grinders were any good, they only admit a certain range of drills ie in perhaps half millimetre intervals whereas we prefer and need more drills in a half mm space! We know this but I've mentioned it again.
So where have I been? Lidl's and Aldi's are good for somethings but I went a little off centre and thought again of having a selection of grinding gear- which does a remarkable restoration of workshop cutting tools.
So why not 'do the Four Facet system'? It doesn't even demand a centre drill or if you are ancient like me a Slocomb drill.
The cost of many of these longer lasting affairs is considerable- and dead cheap.
I looked at one design last night and apart from unearthing a few bits of rusty round, there was about 4 bits of 2mm mild steel sheet and a bit of nylon. One hiccup from being dead simple was that I would have to braze, weld or whatever 2 of the little sheets. If I got the Mig out, I would get away with a few skip welds- nothing more. The brackets were also scrap things given to me.
There are other simple jigs, but that one took my fancy