About 1.4 on my main rig (highest loaded reserve). Landed it once before and I have ~15 rides on reserve canopies plus a lot of jumps on lightnings etc. Still, wish that particular reserve was a bit bigger.
It's pretty hard to find a matching container for a 170 reserve if your exitweight is 250 Lbs and you're flying 139 and smaller main canopies.
some manufacturers will build these rigs, for example Sunrise Rigging (wings). Certainly some others will too.
Mirage makes them too.
I have a mirage G3, made for a Vengence 120 and a Tempo 150. WL reserve: 1,46, WL main (now) Velo 90: 2,35 and storm 120: 1,76
Sure, but there is a limit to the differences in the canopy sizes that can be hobbled together in a rig.
I have a Velo 111 loaded at 2.65 and a PDr-176 loaded at 1.67. I demoed the reserve a long time ago and have used it twice since then. Nice slow, docile canopy with nice flight characteristics and a solid flare.