Arm and shoulder strength could be an issue, but with a good fit, they should be guiding more than supporting. With the two-bolt fore and aft configuration you need to loosen the front bolt half a turn, tighten the rear bolt half a turn, loosen the front, tighten the rear, and so on. I use a carpenter's level but you can also use a smart phone if you take a book or something similar that will cover the whole saddle front to back.