I never miss an opportunity to say how much I love my (older) Archon 100 but I'm liking the sound of these new Archons as well. Local shop has some so I'll have to go compare. Wonder what a blend of the 6CA7s and the KT77s in my 100 would sound like. Good video per usual @Guitarjon.
I recorded a whole album in Drop F with EB Skinny Top/Heavy Bottom 7 string set (10-62) and it sounded just totally fine so it's doable. I just played a lot lighter, set up the guitar appropriately, and used a way lighter pick.