Great question, the FISD has never been in the habit of making someone pull out a ruler to check measurement. Specific numbers are generally to be used as a guideline. The term "little" gap used by Glen though broad would also allow for minor imperfections. Without it's absolutely black and white, no pun intended That said we've all heard the CRLs may be changing, to what extent has yet to be determined. Threads like this are where you can voice your facts, opinions and provide screen shots for reference.