Simon,

So why do you want to get rid of the rule that basically provides a minimum weight, hence provides a loose control on minimum stiffness?

On one hand you argue against the tip weight rule because you believe the builders can go lighter, but then you bring up the point that lighter won't be as stiff, hence it will be slower.

Maybe I'm being a bit slow, but I don't understand your reasoning for removing the rule.

I should state that I still don't have a definite opinion on the matter of mast tip weight. There are pros and cons for leaving the rule as is or removing. If anything, I'm leaning towards leaving the rule for the time being, more for stability in the class rules than anything else.