Are swivel seats made for float tubes? I don't want to waste my time making one, much easier to purchase than invent one. I've got an idea for one that would let you turn 360 and adjust how high or low in the water you prefer to sit. Oh, I live in California if I want to use my weed Wacker with cordless drill, I have to take a class and purchase a Boater Card and register my tube with the DMV!
I'm sure that's not going to be free. All these requirements started a couple months after purchasing my tube. Seems the price is never the full price!
At least I don't have to register a truck, trailer and a boat! I don't want to know if it is every year.