Hi,
While manual steps work fine on a travel trailer, and perhaps can work with a class C, most class A's need to have electric steps or you are sort of stuck in the RV until someone jumps to the ground.
Even with my Bounder, it has 3 inside steps, and it can be quite a leap if the electric steps do not come out as planned.
Normally lubricating the steps will fix them, and there is a amperage sensitive thing to stop the step at the end of it's stroke, not a micro switch. So basically the motor runs until the amperage is high, then stops.
You can go to a junkyard and take apart a couple of GM trucks or Suburban, and see if the A/C controls are the same. Yes my guess is they will be.
Eternabond can be great stuff. A online search can find several vendors, look for a good price. Then check to make sure they can deliver on time. You might also want to check on paint on type of EDPM roof coating. Make sure that it is two part, as water based type can dissolve under standing water.
Good luck on your project!
Fred.
Money can't buy happiness but somehow it's more comfortable to cry in a
Porsche or Country Coach!
If there's a WILL, I want to be in it!
I havn't been everywhere, but it's on my list.
Kangen.com Alkaline waterEscapees.com