@ALB
Believe it or not I felt it handled great. Tracked straight, no crazy vibration at highway speed. I had no issues with maneuverability in parking lots etc. No rubbing at full lock. I'm sure the larger contact patch made it tougher to steer at low speeds but I never drove a Beetle/356 with narrow tires so I have no frame of reference.
I remember while taking my measurements the back of the wide tire was very close to the same position as a stock VW tire/rim. This gave me confidence that the that any additional moment load on the spindle was minimal. I also seem to recall not a big difference in weight between the light weigh aluminum rim and low profile tire and the stock steel wheel and tire.
I still took care to over-design the wheel spacer/adapters for strength, balance, and concentricity.