For what it may (or may not) be worth, I'm not one of the "forget about the compensating 1 degree" folks. I learned long ago (over 50 years, sadly) what can happen if a driveshaft runs at the wrong orientation and it was a costly lesson. The heavier the load and the better the traction/lower the gears, the more certain it is you'll get axle wrap on takeoff. Just my 2 cents.