Tire pressure question
^^^^^ Spent a few years in the business myself^^^^^
I run 40PSI in my front Skinnies 26x6.00 R15LT's and 10 PSI in the rear 275/60/15's unless I want to smoke the rears a bit easily, then air up to 32 PSI.
Home aligned with the string method, Keep an eye on the wear and make adjustments as needed! This really is not rocket science. JMO!