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Ok Jo I’ll biteWhat’s with the colour code on the drawings never seen a reeves drawing with colours, Or is it some secret system that you use,
Just as well you still have plenty of time to raid the stationary cupboard at work for a few more pens
Thought you watched F1 it that technology or sport not sure
I thought the idea of a datum was all measurements were taken from it, that looks even more confusing . maybe it would make more sense after a glass or two?As for punching the holes I hardly ever do that now, just locate an edge and side (hence the datum) and use the DRO to do the rest.
What no rods poles or perches or chains ( opps that’s the distance between two sets of three wooden sticks in a field on which a rain dance is performed ) it’s 22 yards and they are chains with long links and are used in road layout Very old UK units of measurement Sorry Jo about F1
Strangely some of the colonies have totally accepted metric and measure speed and distance in Km but here in the UK good old miles still prevail. Same with plumbing fittings which are still all BSP