Gene: Nice. This is not intended as an insult, but just a question. Is that an ARF or a kit? Nice covering job, either way.

Bill: That's a Clunk, not a Chunk. It's a weighted fuel pickup that goes on the end of the tubing in the fuel tank. It follows gravity and stays on the "bottom" of the tank, whatever orientaion the plane may be, so that it picks up fuel even when inverted (when the top of the tank becomes the "bottom" of the tank. I explain this because if you went to a mail order house looking for a chunk, yuou may have problems locating them. I buy the type that is both weighted, and looks like it was made from a bunch of small ball bearings that have been epoxied together. This type helps eliminate bubbles or foaming in the tank from vibration.

Dick.