CeeGee, The loop sticking out is the fuel line from the tank to the engine's carb. To fill the tank I pull the line off the yellow fitting and pump fuel in the line. For overflow I pull the pressure line of the muffler or when I'm in a hurry I just leave the line on and let it overflow right out of the muffler.
Barry, I don't mean to laugh at your misfortune but the way you phrased it gave me a good laugh. If you're anything like me crashes ruin my day and I may be grumpy for awhile after that. In answer to your question, though I'm not a superstitious man, I'm beginning to believe that having a backup on hand prevents crashes. I have 3 UCD's, two 60's and one 46 UCD. The 46 flies best.

The following is an answer to CeeGee's question about my name and contains no info about UCD's, so, it you read it be prepared to be bored.

As for my alias, many years ago in the last millennium in a land far away one of my college engineering instructors tagged me with the name Rocketman. Somehow the word got around that I was the one launching fearsome rockets in remote areas of the college property. These were not model rockets that you can now buy in hobby shops, they were risky and unpredictable and I ignited them by radio control from a safe distance. Radio control back then had vacuum tubes, no transistors or integrated circuits, and wasn't all that reliable.
By the way, I built a pulse jet engine there also but I was never called Jet Man.

I was only spoken to once about my rocketry antics after a little indiscretion at a serene little pond that had a well kept grassy area around it where loving couples sat and spent their evenings talking. It must have looked odd that a buddy and I were sitting there too with a cardboard box. Being unable to wait for everyone to leave I proceeded to disrupt the tranquility by launching a noisy, smokey rocket boat across the pond which only touched the water twice as it skipped its way to the opposite bank.
In the days following that I could see people pointing their finger at me as I walked on campus. I laid low for a while after that.

The college environment provided everything an experimenter needed to work with such as a foundry, machine shops, and chemistry labs for chemicals (rocket fuel).

I later went to work for Chrysler Corp Space Division where the huge 8-engine Saturn S1B first stage rocket booster was built.
There you have the long version of how I got the Rocketman name.