Re: shrinking fuel line
I change my fuel line with the ones they use on motorcycles, same goes for the fuel filter. You can easily get these in any motorcycle shop that sells spare parts. The stock fuel line hardens and looses it's flexibility. The best fuel line I've seen is the one they used on gopeds, but the diameter is smaller. It's very flexible and tough, and there are a variety of colors you can choose. I do plan to change to the goped fuel line when I get the Walbro carburetor.
Regardless if it's left or wrong, the opposite is always right.
Caution: This hobby is habit forming.