Regarding tire pressure, I usually run 35-36 in front and back. No real reason to run 42 psi in the rear unless you are riding 2 up with loads of luggage. Just my opinion, nothing more.
When running solo on my other bikes I'll run +2 front and -2 rear ie" 38 F and 40 R for a bike that calls for 36/42. I feel the +2 in the front seems to help with preventing dishing/scalloping/cupping, and the -2 rear makes the ride a little softer. I'll bump the rear 2# for a passenger or a lot of luggage. At least that's my thinking on it.
On another note, your preferred tire pressure is really only as good as the accuracy of your tire gauge. Unless you have your tire gauge calibrated on occasion it could be a couple of pounds off either way. I use a digital tire gauge (that will add or bleed air depending on how far the lever is squeezed) but it measures 2# different than my brother's same model digital tire gauge...both supposedly guaranteed accurate within 1/4 pound of pressure lol
BTW the sticker on my truck calls for 32# but the guys at the tire shop I go to always put in 35# when I have them rotated lol.