I have a few questions with reference to the ARC-17.
In looking for a cat that could serve a dual-purpose, I think the ARC-17 may fit the bill. I like what I see with regards to it being versatile. Although, to be completely honest) the thought has crossed my mind that after sailing my P19MX for 4 years that anything smaller may feel like a toy.

Correct my if I am wrong, but here is what I calculated for an open class racing number.
Use the same rating as the original 17 (73.0)
Non-class legal main of greater sail area (.980)
Spinnaker (.960)
Under min. crew weight (280) L3 (.974)
(73.0) (.980) (.960) (.974) = 66.89 ???

The other questions I would like to ask...
Is the ARC-17's beam the same as the original? Is the mast the same height? Can you clarify the Supercat rules that state that in open class racing, # of crew can be increased or decreased.

I apologize if (for some reason) I didn't get all my facts straight before I asked the questions.

Thanking you in advance.
Dave