Haven't read back to see if I have already mentioned it!

But does anyone use a triangular "dot" sight, rather than the usual circle?

They are fairly rare I believe. Bwanabob on NE, used to work for Trijicon in Australia, and told me, the triangular dot may not be as subject to the blur of astigmatism as a circle lit dot?

I believe if one really digs for it, Trijicon may offer this option on some models???

A triangle is actually more accurate than a circle. The point of the triangle being a far more accurate aiming point. While the whole triangle gives a big and fast general aiming point.

Assuming for a person like me nowadays, it deoesn't turn into a twinkling star ....