for 2" the blazers are lighter by 1-2 grains each minimum from recollection when Jim told me about them i asked him to grab a scale over the phone and weigh them compared to the blazers, being a fan of having as much foc as possible it was easy decision to just stick with the blazers
i shot fixed, then made switch to reapers and now love them so last season i shot reapers steered with blazer x2 vanes, saved about 5 grains more off the back end of arrow, they average around 4.72 grains each but when i glue three on a shaft i get 15 grains heavier so the glue makes them about 5 grains each for calculating....the regular blazers go 20 grains for three when i glue em on fyi....keep adding weight if you do fusions
i also changed out my heavier stock nocks that usually run 10 grains or better to easton microlite nocks (basspro has em) which average 7.85 grains each....when it comes to back end of arrow i'm ultra minimalist to keep foc high as possible, no wraps, no lighted nocks
most important though is have fun, i love building new batch of arrows
this year going to give the speedpro 6.2's a try, they average 6.25 gpi over 3 shafts, the nocks are 4.33 grains each and they have a little plastic nock collar that looks to be about 1.5 grains tops which looks heat shrunk on end of shaft....so with 100 grain heads and using the blazer x2 vanes the foc is incredible, i get 14.83 percent when i run it on gold tip calc. with 28" shaft where i was likely around 12 percent with 8.1 gpi shafts last season and microlite nocks and in previous years with similar weight shafts, factory nocks and regular blazers with 100gr tips it was a bit over 10 percent foc....so i can run a 310 grain arrow with almost 15% foc, plenty more spine than i need (.324) and have sizzling speed to boot, will have to watch my draw weight to keep things close to 5gpp with the 65 lb bow as with a d-loop i can add another 5 grain for 315 grains which at 65 lbs would put me about 4.84gpp...so i'd have to drop a pound or two on draw to come in exact 5gpp
i love playing with this stuff
http://www.goldtip.com/calculators.aspx
there is the link to a good calculator, allows you to compare existing setups you've shot to what you want/could build with other shafts/components