Essentially I want to get something that at least given an impression of the real thing, as seen in the image kindly sent to me by Ray Pilgrim, which shows a set of points at Crookwell.
So I've added a second tie bar to the points just to check out the overall look and make sure it works ok. It seems to be easy enough to add and I think gives a reasonable representation, or at least it should once painted and weathered etc.
Time will tell, although I'm sure I'll find a few more ways to do this before I'm happy!