I've ordered several replacement nozzles from Filastruder, being in the US, and several hot ends direct from e3d, in an attempt to do the nozzle orifice bore length reduction mod that mhackney pioneered on the seemecnc forums. I'm using the 3mm variant. The issue is that external nozzle geometry apparently varies, making some nozzles impossible to bore out, while with others, I am capable of doing so. The taper from the nozzle tip to the base of the hexagonal portion varies considerably, measuring the diameter at the widest portion, some are ~4mm and others are around ~5mm, and it appears to be a crap-shoot as to which one i'll get when I order. Have there been any nozzle geometry changes? And is there any documentation with dimensions for both variants?