If your saying that the tention is inadequate to completely re-wind then heres what I did. No special wrenches or pliers or dangerous adjustment of the springs.
Extend the awning. Remove the arm from the bottom of the MH as if you were going to use it in the post position when extended. Give it a couple complete turns in the tightening direction. Its now like a giant lever. Do the same with the arm at the rear. Attach the arm to the MH at the bottom and see if the couple turns is adequate. If not, repeat. Simple and no danger to the person doing the adjustment.