I made a DIY poncho liner UQ and used it several times. I have since purchased a HammockGear Phoenix 40* UQ. It works out awesome. I mean for spring,summer,early fall. Aside from buying another 20* UQ for colder temps, could I use both the PL UQ and the Down UQ together to get more R-value ? Keeping in mind not to compress the down ? Any idea's ? Thanks.