I purchased a USA Trains speeder at the Council Bluffs, Iowa train show last weekend. I relly like it. It is, as the wives at the show said,...cute. It also gets my golden retriever going nuts chasing it around the basement at full throttle. Anyway, it runs OK on my track, but the track does have to be very clean or it sputters around the loop. So, I was wondering if anyone had tried to convert one to battery? I heard a rumor about a 9 volt version, and I thought I remembered an article in GR, but I can't find it. Please feel free to post you photos and/or description of how you converted it if you have done so. Or, offer any suggestions for what to try.