Apologies for misleading on that one B S! It got me thinking back to when I assembled mine, and I was in the same predicament - didn’t take photos of it all properly when stripping it down. I didn’t have the spare chassis and roller to compare it to at the time. And I had only previously restored 17s. So I made the assumption of the counterweight offsetting the engine weight. So, gladly seeing your nice example here sparked the memory, and solved the puzzle!
