@smodtactical Keep us informed as burn in continues. My Acmes now up to just over 80 hours, started blooming at around 60 hours, only getting better for last 20 hours, each listening session different and better than previous. Sound stage and imaging just amazing, and its claimed 150 hours for full burn in on Acme.
As for general burn in of tubes, interesting statement on EML website that burn in from tubes has much to do with on/off cycling. The idea that burning in tubes much like forming of capacitors, the heating and cooling stages are most responsible for burn in. Also claim, tubes should be only played at low volume at initial start and only gradually increased as listening session progresses, finally limit listening sessions to four hours. I've been following this during Acme burn in, can't hurt.
Changing out your resistors should be another worthwhile mod. My two favs are Texas Components (nude Vishay) TX2575 for clarity, resolving capability, Takman carbon film for musicality, a bit of warmth. Recently replaced six generic in my Coincident Statement pre signal path with the Takman, added just that tiny bit of warmth/more natural sound looking for. For electrolytic mods Audio Note Kaisei and Seiryu, I've done both, prefer them to Nichicon Muse, FG and Elna Silmic.