Larry,
i am new to the armor field, but w/ my plane builds, it was enough for the kit to capture the 'spirit' of the original. it is up to the builder to decide when 'enough is enough'.
let each builder count their own rivets and check their own panel lines.
when i built the Tamiya 1/48 Wildcat
(sorry, it has wings, but the point remains the same)
i was aware from my own 'research' and reading reviews that Tamiya
had done the cockpit floor incorrectly. this did not ruin my enjoyment one bit. i was much more put out with the canopy that is too narrow to be displayed open w/o much fiddling, the fuselage underside marker light that i sanded off while working the seam, my use of Floquil 'Dust' that makes it look like it has real dust on it instead of flatting the paint, the parts where my masks creeped up and the soft edge of my camo line ran away, etc, etc.
if someone wants to pick on my shortcomings as a modeler, fine.
but don't bust my chops because the kit is not a 100% accurate representation of the 'real' world. i built what they sold me.
i'm sorry, what was your question?
no, seriously,
"when do you stop correcting the kit and just let it stand as is?"
when you are happy, Larry.
or just before you stop having fun.
if you like research & mods & scratchbuilding, knock yourself out.
if you like to glue & paint and put finished models on your shelf,
hone your techniques and let the 'inaccuracies' go.
unless you feel some compulsion to compete (contests) or please others (not all of them will ever be happy) -
do what you want.
if you are having fun, the hobby has served it's purpose.
if you want to make yourself miserable, start next year's taxes early!
ed.