Remember the old adage 'rules are for the guidance of wise men and the obedience of fools'.
It doesn't do any harm to overshoot the final weight a little once the bow has been tillered a good bit unless you are building a bow right on the limit of maximum performance. Afterall you'd expect a few inches of extra draw length built in for safety (or over enthusiastic flight shooting
).
I'd think overdrawing early in the tillering process or when the wood is green is more detramental.
Reducing draw weight is less likely to harm a bow than trying to squeeze out extra weight by shortenning, reflexing etc.
Del