Ok, got the 10 deg cut on the top of front spars, sanded and scraped excess glue off. weighed all 4. L RFront spars- 6.86lbs 6.57Rear - 5.14 5.41total - 12.00lbs 11.98lbsBoy I got lucky. cant get much closer, but interesting how much difference(around .30lbs) in the pairs.Keep in mind my XL is more of a Medium. I've reduced the span from 154" to 138" per. this gives a LEU span with XL size caps. so these will be a bit lighter than common XL spars.