Lance,
Many thanks for the kind remarks re-the jigs. Actually I think that they are from the Ark rather than state of the art, but then I would need to recheck my OT biblical references - how many cubits and spans?…. My intention in showing these photos is to try to encourage others to see that sophisticated (and sometimes expensive) equipment is not needed for successful modelling. I am not opposed to such equipment, I just do not have any and think that simpler solutions are often just as good but as you suggest they do need to be thought about first.
In any event I do like the suggestion that I should adopt the cal sign "von Jigmeister" - my wife is German and she too thought that was a hilarious idea.
With kindest regards,
von Jigmeister.