That's good news Jeff. Glad to see someone is looking to the future here in Oz anyway. Good stuff.
The club I race at is essentially a mono club and cats are tolerated only just. We have a fleet of about 14 cats sailing most Saturdays.
I did buy a small training cat which was stored in the club but only a couple of young blokes used it and then while I was away for a coupla seasons it disappeared.

I guess anything is possible, though I have to say that the 430 at 2.4m beam is a very stable platform and very well behaved. A small headsail would probably give a crew something to do other than help to hold the boat down if it was sailed two up. Spinnaker is optional.
I'm selling our house soon so the moulds will probably end up going to the tip when that happens.
Darryl is closer to you guys and I'm sure he'd be happy to help you get something going.

Good luck with it,

Bern