Dumb question... +/- .015 on crankshaft

[Mike Taylor 3601]

I go with the every little bit helps theory.. 1 here 2 there 5 there all ads up into a bigger number....
the+.013 stroke is the probably least amount of gain in the crankshaft mods.. I believe the equalizing of the stroke and the indexing of the throws are the more important...
getting all the cylinders equal on stroke and same timing...having all the cylinders equal, producing same power..you could ride a bicycle with two different length cranks for the pedals and have them 120* apart, but it sure wouldn't be smooth or very efficient
when you are grinding a stocker crank you better have a stroke gauge.. crank grinders are set for stroke but it doesn't always come out exactly what it is set to .... we go +.013 and if you miss by a couple thou on the stroke wont check legal... I check stroke as I go and some times have to adjust +/- a few thou on stroke...
best I can tell around .040' on index=about 1*

[HP HUNTER]

Every crankshaft grind starts with a straiten and then this.