I believe speedy. A guy that works at the radio shack by my house did the same thing to one. It FLEW!! The only prob with his was it was just way too top heavy. Any kind of turn would flip it. He was running on carpet (the office type carpeting you would find in a store.) Maybe that's what made it worse on the cornering. He was telling me that he had better results running the stock green motor with the 9V as far as a gain in performance. He told me the faster motors didn't really show that much of an improvement. Regardless that's an awesome mod speedy. Hope you can get a digital camera soon and post some pics. I just got a unbelievably great deal on one! It's a fuji 2600. $130 bucks, brand new, first quality.(not a refurb)
