DISCLAIMER: I have never used an UQ. I have also never backpacked (yet). My DIY experience is one gathered end hammock ala Knotty's instructions.
Would it be worthwhile to have more layers of IX? I see that having 3 layers can get you into the 30's if everything is set right. Has anybody tried 5 layers?
My plan is to build the base 3 layer with draft tubes like Scum did, but with small draft tubes running the long way as well. Then build a completely separate 2 layer slightly smaller so that it nests inside the larger.
So essentially when used together, [starting on the outside] I would have ripstop, 3 layers of IX, ripstop, ripstop, 2 layers of IX, ripstop.
Ideally I could use both individually in warmer weather, and combined down to ??? deg in cold.
My concern is that there is a point of diminishing returns and adding all the weight wouldn't give back much in warmth. Also does having all the layers of ripstop cause issues?
I haven't quite figured it out yet, but I am thinking some sort of quick disconnect for the suspension on the 2 layer so it is out of the way when used in system.
Does this have merit? I may be out in left field on this!
Thanks for any feedback.