Nice job on the arrows, they look pretty good from here. POC weight can vary 100 grains within a 5 lb spine range and I've seen 150 grains with Douglas Fir. Within closer hunting ranges the effect of 40 grains will be minimal. If you are looking to shoot tight groups at 20 yds plus, then you are going to want them matched closer, like 10 grains total spread.
Spine is also important. With paper tuning, I can see when I get outside of a 3 lb range; fletching will straighten up a couple pounds outside that. Most wood shafting is sold in groups like 55-60 lb and that is a 6 lb spread. I like them matched closer. Most dealers that hand spine will match to true 5 lb spread, ie 55-59, or even closer if requested. Paul Jalon of Elite Arrows routinely matches to 3 lb.