lol, i know. I deserve that. Im an over analyzer. I read them 3 times but they never stated that the tool is for reference readings, not an exact measurement although i should have been able to come to that understanding on my own. Everey measuring tool i have used gives an exact measurement and i suppose thats what threw me off.
Regardless, now that i understand how to use it, i love it. Very excited to find out how proper head spacing with FL sizing will improve my results.