I just used my first cone in about 2 years this week, myself! So far decent results, but I'm going to keep experimenting.

I went with a-cone, too. It is chemically made up so it will only leave 1 layer of itself, and it targets damaged areas. So a-cone itself won't cause any build-up. (It still must be removed with a surficant, of course, but most low-poos should do fine.)

I can definitely tell it's in there, tho.

I have thought about trying HH, so I'll be following this thread, for sure!

My concern is will moisture be able to get into my hair shaft ok with this cone?

Of course if I poo it off, moisturize and then apply it like a LI (as you did), there shouldn't be a problem, right? Sort of using the cone as an added sealer? Or is rinsing it out better? Idk! Lol!!
2c/3a/3b, Fine/med, Dense, high porous, & normal elas.

Lo-poo - Renpure Keratin, SMR, Giovanni SaS
clarifying - mix Johnson's H2T with low poo
Co-wash - Suave Nats. clar. or coco.
RO - GVPCB, Ion Eff. Care, TN.
LI - SMR, Cure Care, or RO
Seal - MO or Jojoba
DT - + honey, ACV, & EVOO to SM masque & GVPCB
PT - Gelatin!, CNPF
Styling - FSG, AIF, BRHG, LALS/PS, GF curl spray gel, SM Souffle/Smoothie, LOOB
Oils - MO!, EVOO, jojoba, GSO, SM Elixer, EVCO, VO5 Hairdressing