DSR1 questions

I have searched all over you tube and the internet and can’t find a simple video that explains how to set up basic Functions on the DSR1. First off I love my system but I would like to Tweak the sound pitch and sound stage.
I have Hertz Centro Up front and Hertz Uno in rear doors, I currently have gain turned down on Perfect tune app for rear doors to -2db while fronts are 0. Still can barely notice a front sound stage, it sounds awesome but sounds like it’s in surround mode.
Also the tweeters are a bit on the bright side and James helped me change some settings using the app but they are still a bit too bright on many songs when cranked( my wife describes them as fuzzy sometimes)
James has been there for me every step of the way but I want to teach myself how to adjust my equipment and not call him for every tuning question. I feel he delivered above and beyond and it’s up to me to understand/learn how to make adjustments in tuning for me.

If we had some experts help us with maybe a sticky strictly dedicated to a dsr1 it could benefit many members because that appears to be the way many are going that are removing stock amp and keeping factory head unit.