Yeah those toes are tricky to keep warm sometimes. Last trip I was on my toes were great, but my heels got a bit chilly - so I'm adding a little ccf pad into my sleep system to go in my footbox on cold nights (I think shug does the same with a blow up sit pad)
Anyways keep at it man! Its cool honing in your sleep system. And the guys here will offer plenty of good advice learned the hard way I'm sure.
By the way, it may just be me, but I think your picture links may be broken.