Thanks, but I'm going to stay away from a top handle. I want to teach him to start it on the ground with his toe through the rear handle and his left hand on the front handle.
I'm still looking at the Mac 3200, regardless of where it was made. I've learned more now from looking at the parts on eBay, and I like the design. It's built like a real Mac with a horizontal cylinder and a direct metal bracket off the bottom end to hold the bar bolts, which I like structurally even thought the rest of the housing has lots of plastic. I think it would be suitable for this purpose - light, rear handle, chain brake - and I find it interesting. He'd probably think it looks kind of cool. We'll see if I can get one cheap, but I'm in no rush.