If there are measurements, I'd assume they are pretty forgiving. The boltrope length between two of my mains differs atleast 4-5 inches. Two of my spinn luff length's differ around 4 inches and I've heard of as much as 18 inches difference between a batch that a dealer had.
Trey, sorry for holding your feet to the fire on this subject but I've heard too much about it and since nobody else would say anything to you, I thought I'd try to get the story out and put it to bed, good or bad. Frankly, if you weren't the class rep, I could care less what you did.