I just decided to step out of the Basic Clark insulation method.
I always used the Clark storage pockets as my insulator by putting either bits of clothing in them, or ziplock bags full of leaves. It worked ok. Never really had any Cold issues.
I found a KAQ 2/3 under quilt ( the Lost River ) on E-bay never used and I got it for $105.00 shipped.
I am learning to pack lighter, so I have less clothing for in the pockets, and messing with leaves is getting old real quick.
Looks like my first opportunity to try out the "Lost River" will be sometime in April at home and also at the outing that MAHHA is having at Pine Grove State Park in Pa. at the end of April.
I'll let you know how it works out.