Hello Chas, I just got back from a trip up North for a little more than a week, B+ ran great. Yes I did install a 5 ton scissor jack in the front attracted to the two frame forks. I used a 4" x 6" steel I- beam and attached it to the frame with 3/8 inch bolts. I will send pictures if anyone request them. I use it only if I can not find a level spot and my nose in pointed down a few degrees, It enables me to raise it up so that my shower will not drain out of the tub on the edges if it is off a few degrees. For some reason the B-pluses are all nose heavy,so if you find a level spot the nose is always down a few degrees.
Another option that I installed were the electric stairs, my unit did not have the option when I purchased it. My wife thanks me everytime she uses it. If anyone does not have one its a pretty easy option to install.