... change now takes place at 1:8.125 instead of 1:8. Brian, the two K-crossings should always be the same angle, otherwise you will get a sideways jolt in the running. However, to be strictly mathematically correct for the irregular diamonds there should be a very slight difference between the two angles. Which means that wherever you set the limit there is a rare chance that the two K-crossings will fall each side of the limit. See for example this result of make diamond-crossing: 2_231537_170000000.png The half-diamond on the right has a K-crossing angle of 1:8.1 -- i.e. below the new limit and therefore it has fixed K-crossings. To match exactly the one on the left has a K-crossing angle of 1:8.13 -- i.e above the new limit and therefore it has switched K-crossings. This is going to be a fairly rare occurrence, but I have a note in the book to fix it. I think the best solution will be to ignore ...