"A previous comment said to tie only to the tube, not to the arm, and I did not understand that."
I always want the loop of the hold down strap to be where the pin from the tube goes into the bearing on the arm. This is your strong point and will prevent damage. If the tie downs get in the middle of the arm and it could get bent, I would imagine with very little pressure.
Ric and Jan Golding
2016 Jayco Seneca 37FS