Glad my suggestion worked for you
You want both the front and the rear of the bike to be set up properly... So, first things first - I would start with the factory recommended settings front and rear for preload, compression, rebound, as well as where the forks are in the trees (higher or lower than stock?), as well as checking the rear shock for any changes in ride height.
Next, get your racer friend to help you set the sag. Make adjustments as needed to the preload to get as close as you can to correct. 25-35mm is a good ball park to be in. There are plenty of instructions on here about how to do it.
Once the sag is set, you can start to make some slight adjustments to the compression and rebound damping. Does the bike feel like it is hard to turn or resists entering a corner? Does it turn too quickly? Take a few rides up and down the same roads and take some notes. Mark down the compression and rebound settings. Make adjustments two clicks or one turn at a time so if needed you can go back 1 click or 1/2 turn. Again, take notes of the changes, and try to run up and down the same roads as much as you can.
Be careful! Speed is not critical, but try to go at a speed you normally would. What feels choppy at 30 mph will feel better at 60mph usually.
What the heck are you doing with a 63T rear sprocket? Are you riding the rear wheel down these 1 mile long curves? A big sprocket like that will also affect the handling...
