Re the plates.
Yes They are longer than is normal, having sailed the inter 17 (which also has long plates) I decided that long plates were worth expirementing with - If at a later date I feel they are too long, I can always get the hack saw out. As for SCHRS, the rule currently only hits plates up to a certain aspect ratio. I agree that I'll need to be raising them when it's windy (and also light), but I'll live with that for now.
Looking at the side on view of your Stealth, a question comes to mind: You have lowered the bridle fixing points on the hulls to accommodate the long luff jib, but the spinnaker pole seems quite high, will this be a problem when you get your jib kit ? Or does the pole just seem high because the cat is on its wheels.
Bridal position is the standard for the 2006 boat.
Pole was just "thrown on" so I could go sailing, it will be dropping a fair bit more On Friday. not sure how-low-to-go, so I shall drop it so it's another 100mm lower and see how that is.