Thanks for the comments everyone.
The Myrtle is a funny wood in that it doesn't really have much of a tap tone as raw wood but seems to come alive when turned into a guitar.
It produces nice lush top end (plenty of overtones) and the two instruments we've built with Myrtle have both been loud.
Don't mention cases - it's a sore point.

In fact I'll be in America in a few weeks talking to someone about cases. Cases are alsways available for Dreadnoughts in this country and for OM/OOO sizes a classical case is about the right size. Anything smaller or in a small jumbo size forget it.
Kim - the pickguards I got from Ebay and are from Martin. I'd run out of the Greven Tortise ones. OM size pickguards are a little hard to come by unless you make your own. Neither Stewmac or LMI supply them and Greven is the only reliable source I can find.