I bought the Jensen connection for about $25 bucks including shipping from Jensen. Worth the cash.I added the 4" heater hose to the garage heater vent and to the bathroom vent, as I had no flow in eitherI had two of the tow max tires separate with less than 500 miles, thankfully no real damage, replace the other two this springI moved both the spare tire and jacks forward as I do a lot of offload camping and dragged the corner jack off once.Added a 4 black pipe tube to store Wiener sticks and a 5" to hold the sewer line behind the wheels. A 12v receptacle in the convenience center