The observant amongst my readers may have noticed the old grease gun on the inside of the curve with the handle for the plunger sticking out. This was a mistake. I was working to the wrong line on my bench when I put this in, and at the time I left it in, intending to cut off the excess later and tidy up the end. But I left it in as I liked it. Then at the Boort Show a cheeky 10 yo boy asked me what it did. I explained that SoundWave had a slow puncture and that it was a pump to blow it back up. So very seriously he pumped it a bit until I said that that looked better. So all through the show I had kids come up and ask me if it needed a pump. So SoundWave got a good pumping!