I'm currently running a Dalton 41/35 blk/org at 70 with dalton weights and blk/blu primary spring running Max Spool 17. I know some really like the 39/35 reverse helix. I recently picked up a dalton one. Wondering how others have setup with 39/35 reverse helix and spring? What differences between these two helix angles performance wise? Still learning about clutching so any info is greatly appreciated. I also have a blk/grn dalton primary spring I know that will raise my engagement some but top rpms should be similar due to the very close finish. Thanks and everyone ride safe. Headed to the County next weekend for some big mileage days if anyone is gonna be up near Ft Kent or surrounding areas let me know.