100% agreed. The lower-treble control plus added content in the sub-bass and lower-midrange add a beautiful analog feel that returns some of the weight and substance that the stock one lacked. Good call!
Vinnie Rossie used to offer the Red Wine mod, but I don’t think he does anymore. You can probably contact Ryuzoh of Musashi Sound technologies to mod it for you, but I’d first question the safety of the mod if I were you. His AK70 mod in particular wasn’t as reliable as i would’ve liked, but his other ones have a pretty good reputation, so YMMV.