Nothing wrong with doing that, but just so the general viewer knows, weight differences are probably the least important aspect of arrow tolerances. As long as it doesn't affect spine or straightness, I doubt most could tell the difference with a 10 grain variance shot at hunting distances. In addition, I find the biggest variances in weight to come from inconsistant tips and broadheads, not arrows. Sometimes the best method of assembly is to put the heaviest tips on the lightest shafts in the bunch - if weight consistancy is your goal. However, I don't recommend it. I would put the heaviest tips on the arrows with the stiffest spine. This is likely to end up making an even heavier combination, but I find that keeping dynamic spine consistant is far more important than weight matching.