Watched a buddy lose two weeks to a guy like that, all talk until the deposit, then silence.

Pulled up some old carpet padding in a place up in Lakewood and found a whole row of finish nails sticking up like tiny spikes where the last guy just pounded the trim back down instead of pulling it. Learned my lesson the hard way when one went through my sneaker sole. Now I keep an old pair of leather work gloves and a magnet sweeper in the truck, because staples and nails hide real good under that dusty padding. Walking the floor with a magnet before I touch anything has saved my hands more than once.

Zooming in and hoping is exactly how that 1/8 inch slips by, because at full size it looks fine and your eye stops looking. A better habit is to drop a known reference line or grid into the reused file and check it against the new base point before you copy anything over, which takes about ten seconds and catches the shift right away. The other thing worth doing is typing a couple of overall dims and checking them against the field numbers, since the math will tell you the truth even when the drawing looks right.