thought some of you would get a giggle out of this.
My old standby setup has been neos, with the inside being a set of sorel liners glued to approach shoe soles (cut away all the uppers leaving only the heal cup behind, then belt sanded on the bottom thin out the sole down for the most interior space). I have used these for years and did the idita once using them.
This winter sustained weeks of below zero this winter (never seemed to get cold toes in the past at low temps) left me craving a bit more insulation. My size 13 feet do not make this easy and I could feel I needed it more on top of my feet then from the bottom.
So that was the direction to go - needed more height to the neos. scissors out, cutting them in half made me formally committed.
added 2" of material to the tops..

and connected this to the neos soles.

Made an inner bootie out of hi-loft synthetic insulation, stuffed it in. Finished boot.

They are a freak show and gigantic, but ride great and are toasty.