Many Thanks to all who responded !
I had an opinion, but you folks verified it.
With regards to storing with the jacks down, many opinions vary.
I'll offer mine, and it's worth what your paying for it.......
As an owner of a fleet of medium duty trucks, I have learned that the service life of tires on a Motorhome is relative, but not limited to, the fact that the tires (in addition to the suspension), are LOADED, in some cases almost to maximum limits, every hour of every day. A medium duty truck is typically only loaded 50% of its service life.
I think it's a good idea to store a coach with the jacks down, at least supporting some of the load.
More important is the surface on which it is stored.....concrete OK, gravel or asphalt require isolation of the tires.....wood, plastic, etc......
Next question, which might be best answered via a call to P.C., can jacks be added, retrofitted, to a unit at the factory?
Happy Motoring
Johnny