I see exactly where you are coming from Gerry; most attempts to ‘improve’ MZs seem to end with a qualified success at best – and those are the ones you here about.
On the other hand I’ve no reason to believe that the brief given to the MZ designers 40 years ago matches my requirements or indeed what sort of bike the company would have liked to design had it not been constrained by cost, lack of modern machine tools and materials.
So, I shall continue to try to improve my ETZ. At the very least it will provide a future owner with an interesting project should he choose to return it to its original condition.
Ian