I spent about a year decidning on the right kit for me. Check out fattywagons.com. the owner (Kieran) is awesome, extremely knowledgable and not stingy with info. He will email you personnally usually within several hours. I went with a single tank system for now and am looking at possibly an additional heated sump and HIH for colder mornings. I installed the single tank benz kit in about three hours. Initially I had a bad ground but, was able to quickly trouble shoot and fix. I could not have built the kit for much cheeper than I bought it.