Wet Signature on W&B?

"MikeM" wrote in message
...

The "unusable" fuel in my 182 is only 3 gal (79 usable, 82 total),
so even if the AP did the calc wrong, we would be quibling about
only ~ 18lbs. How you think you got screwed out of 60lb?

I added all the mods that had happened over the years to the
data sheet W&B (with the exception of a paint job, which I assumed
ended up being a wash). There was a 60lb difference, which I
attribute to the A&P mathematically subtracting 79 gals of fuel
when there was actually more). I assume that the 10 gals difference
that this represents is made up of some unusable (which the A&P
forgot to account for) and some extra buffer courtesy of Cessna.
The POH claims 5 gals unusable. Also, I drained the tanks once
for an SB (and for fun) when the 'stick' indicated 20 gals. I drained
nearly 7 5gallon drums worth.