OK; this has really gotten out of hand, and for this, I apologize. In my first post, I did not know that some RV's need good charged batteries to work the slide; now I do. I did not know that the 4-seasons package on a Montana was a piece of quilted aluminum foil; now I do. I know what de-lamination is; I've read about it in Trailer Life and Highways and 'most' fiberglass sided RVs are susceptible to it. There are a lot of write-ups from members that maintain their RV's in good condition and have problems with de-lamination. I mentioned that I have an older Holiday Rambler. My RV is totally 12 volt except for the electric outlets, the microwave, and the air conditioner. When hooked into shore power, WITH NO BATTERIES, everything works, including the slide. The converter converts the 110 Volts AC to 12 volt DC. When disconnected from shore power, everything in the RV works, except the microwave and air conditioner, off of 12 volt battery power, INCLUDING THE SLIDE. I did not know that manufacturers had cut costs by eliminating the high output converter; now I do. So again, I apologize. This is just another reason why I choose to keep my RV. Mine has smooth 1/8 inch thick aluminum sides and the top is the same material. The newer ones have the laminated fiberglass and rubber roof; I don't like either one. It reminds me of the vinyl roofs on cars back in the 70's; the manufacturers hyped everyone into wanting one until they had it for a while. Everyone knows what happened to vinyl roofs on cars. Anyway, thanks for all the replies; it's been a lesson for me; I've learned a lot. I'm glad I bought Holiday's best trailer in '94, even though I paid a premium price. It's much better than anything on the road today.