The BN4 also was top heavy on my rotisserie. I originally built the rotisserie for a much heavier American car, which balanced much better. To have the Healey properly balanced would have required welding up different attachment pieces at one or both ends. If I did this again with a Healey, I might well take the time to make up those pieces. I could turn it alone, although a second person did make it easier. Although the rotisserie has a friction locking mechanism to prevent unwanted turning, I also drilled holes in the end swivels and inserted heavy pins (bolts) for extra security.