Duh... I ain't never thunked about that! lol
I'm not sure i understand what you mean about "Write the value down somewhere near where you zero, or just remeasure it".
What i normally do when i'm locating something on the table is:
do a c3
manually move carriage to center of material on location of table
write down those coordinates
then Zero X, Y
So do you mean basically do the same thing only in the Z axis?
Words of Wisdom:
“Words that sink into your ears are whispered…… not yelled”
“The biggest trouble maker you’ll probably ever have to deal with, watches you from the mirror every morn’n”
“The only difference between a rut and a grave is the depth”
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Just remember...when it's time for the hearse to pull up..there's no luggage rack on top!
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The beauty of the Second Amendment is that it will not be needed until they try to take it...Thomas Jefferson