Last year I used Dan Lepard's recipe, featured on MN, and they were wicked.
However, piping those crosses on 2 dozen buns nearly drove me mad. I used the recipe for the flour paste and piped from a small slit in a bag. The flour paste would kind of stretch out during piping and I could not get any kind of eveness to them so picture a fat-merging-into-thin wonky kinda line or sometimes a break in the line!
Tomorrow is HCB baking day and I'm tempted to leave the crosses off but what is a HCB without a cross?