Tuning Street Demon carb

Test drive went well, AFR at WOT is more where I want it in the mid-12s but up in the higher RPMs it's leaning out a tad, just about hitting 13.0:1 around 5500 RPM. I remember talking to a guy at a track day/car show combo event a couple years ago and he said specifically the Street Demon carb wants more fuel flow at higher RPMs for it to not lean out. He had moved to CO from TX and had a lot of experience working in engine and hot rod shops tuning muscle cars and had a customer with a Street Demon where the final solution was to do a return-style fuel system with an electric pump (iirc) and rising-rate regulator. I'm not interested in going through all that and it doesn't lean out to the point of being dangerous to the engine so for now I'm just going to live with it and probably get a DP carb on it at some point like I've wanted to do for a while. I guess a return-style fuel system wouldn't be a bad idea overall but I don't feel like running a return line to the tank anytime soon lol. Other mods/upgrades are higher priority on the list right now.