I'm having trouble getting notes and/or chords to bloom when held (even at max volume). My current rig: Lil Dawg Harvard (5f10) combo Combo has a 12" Fane Ascension A60 speaker (8 ohm). Extension Cab: Peter Mather matching tweed cab with 12" EVM 12L (8 ohm). The combo and extension cab go into a Dr Z Air Brake (to keep neighbors friendly). From the amp's build sheet: JJ 5Y3GT rectifier tube Mercury Magnetics transformer set upgrade (FTWHARV-P, FTWHARV-O) Sprague Atoms filter & bypass cap upgrade SoZo Blue Molded coupling cap upgrade BTW, I define bloom as holding a note or chord and having feedback/bloom kick in (usually the 5th above the octave of the fundamental, but this varies according to pickup position relative to speaker cone). I've tried 3 different overdrives to push the amp a bit more hoping that would do it, but no luck: Hudson Sidecar, Zendrive and Black Magic by Crazy Audio Circuits. All excellent overdrives, none make much of a difference. I do have the volume maxed out on the amp and have held the pickups right up to the cone on the Fane. I play an assortment of Teles & Strats (Tom Anderson, Fender). Perhaps someone who knows this circuit can shed some light on this? Thanks.