Is there some sort of standard for how inaccurate woodworking
measurements can be?
I have been working on a fairly large and complex project and discovered
that my depth gauge was 0.02" to 0.03" off, the square disagrees ever so
slightly with the tape measure. This doesn't sound like much, but some of
my cuts have to be very close to spec and I'm using two different machines
(and measurements) to make the cuts.
Everything has been fine up until now because I haven't had to measure
the same thing with two instruments. I had always used only one tape
measure and regarded its measure as "truth". On this project I broke out
the B&S electronic caliper, and a few other measurement tools. I'd put
them away and stop all the trouble, but I have to make sure that some pretty
tight clearances are met properly without a trial assembly.