I have an extra set also, since they included an extra with traction tires. I don't think I need any more. A few years ago, I published a thread on what happens when my two-year-old (at the time) grandson, reached out and grabbed the J1 as it passed by. I was holding him in my arms at the time and he did it so fast I couldn't react. The result: The 11 pound monster came down into my leg and then straight to the concrete floor. Result: head light assembly smashed, front left steps bent, and rear of the cab separated from the lower plate.
I ordered a new head light from PSC, reshaped the steps, epoxied the rear plate and repainted the chipped paint. Came out okay. Jack is now 8 and treats trains very carefully.
Before:
After:
