I need to fit an underslung LPG tank to my MH as I hate paying over the top for gas and having probs over europe etc. I've seen LPG tanks on Ebay, usually from scrapped vehicles. Can these be used? It would appear that you need a vapourising tank, not a liquid feed, how can you tel what's what? I'm competant to do the install, but don't want to buy the wrong stuff. Any advice??