I am sure ANY change to the rules will lead to significant changes to the design of airplanes. Even now within the rules in the past 5 years there have been a lot of changes with the coming of electric and very powerful YS engines.

Any change will only mean that current airframes will become obsolete. Talking about cost.

I think the most common sense approach is not to change the rules but allow, except for Worlds or like European championships, a somewhat higher weight except if that excess weight leads to a competitive advantage. Since we are all knowledgable enough we will recognize that when it happens.

Of course for those that want everything in black and white and no exceptions that might be difficult to manage, but hey, get used to it I would say!!

Volkert