Whew, I got rid of the guidelines. Most of them seemed free-range, some were only available for deletion by way of hiliting groups.
Rather than bother with grooves and standards, I’m going straight to the shelves. I draw a rectangle (intent on extruding and conponentizing the first shelf). I want the rectangle to be exact, the width of the member my rectangle is snapping to, and I know it needs to be 3/4" thick, but the dimensions I’m seeing are all approximate (and absurd!). I see why (but not really why) I am snapping the rectangle to where two boards are meeting, not to a single board.
So just to prove my point I go to where the other shelves are needed. This time I get much more accurate measurements. But they’re still approximations! I know the shelf needs to be 3/4" exactly but ~13 3/8" (+/- < 1/16") isn’t exact.
I was hoping I could accept the snap width and just keyboard in the 3/4" but that doesn’t seem possible and I still don’t know the exact dimension of the board!
nor the board from which it was copied.
Seems I need to redo all the verticals?