Good news, overall a pretty basic set of rules, 24Degree fixed timing, locked comms, mabuchi wrap 19t full stack arm, with normal magnets.
Sounds just like a evolution of the "old skool" stock motor rules.
Current stock motors are way over engineered, 19t at EC has been a great class, a bit more speed but not stupid fast as in mod, do not need fancy motors or batteries.
I have been using a $50 Atlas machine wound 19t Locked timing, with my old packs and going quite well.