first question - is it worth it?
second question - I take it should be as simple as planing them off, then repainting the hull? in that they contribute little to the stiffness of the hull?
I have done just this and can advise on the pro's and cons.
Without stiffness is reduced considerably but I found a great way around it. Happy to explain and show photos of process. Feel free to message me for my email address.
Alex,
Be careful that you have space to get the centrboard back in the case afterwards. My board pretty much follows the keel line so I have not been able to make this modifcation to my Cheshire Cat without re-profiling the plate. Gerry Ledger advised me some years ago that it would be OK otherwise a my boat had both keel and hog. I suggest you talk to a boat-builder before you take the plunge.
Is it worth it? - I don't think so myself.
Dave
If they were any good performance wise we would see the on dcbs and paradigms.
Hopefully my photos helped see an alternative safe route should you want to go belt and braces.