i loved the slapstrap pro's and replacement carabiners. the biners saved me weight and got my whole ENO SN down to 18oz. and they really do just slap up there. there's some distance between those loops but i found taking the straps higher or lower up the tree would fine tune. and i never noticed a bit of stretch at all.
but then i realized i was getting some calf pressure. i wanted to stick with the simplest possible solution so i got real long strapping and just went from the whipping to the tree. with 3 or 4 go-rounds on the tree i found i didn't need any hardware or knots at all on the tree side. so that was even easier but weighed more.
after that i picked up a couple of different HH's and just went with their stock suspension. eventually i switched from figure8 to tautline and that's where i am now.
tomorrow i'm expecting a new WL Snipe to show up in the mail and that comes with Whoopsies. i'll let you know how it goes with those.