Nice work, Bob. I'm jealous of that location, coming from wet and green Ireland.
Have you considered getting something like Prodad Mercalli to stabilize shots? It's great for general stabilising as well as smoothing out tracking of aircraft/birds etc. I've used it to rescue handheld shots where I had the OIS turned off as well (duh).
For shooting aerial stuff like this, I'd say you did very well if that was all handheld! The HMC40 is so light and tiny that I find it very hard to shoot without putting it on a shoulder stock. I use the Bush Hawk BH-220D shoulder stock for shooting stills at air shows... it's this gizmo here: http://www.amazon.com/Bushhawk-BH-220D-Shoulder-Mount-Black/dp/B000Z57V98
I have tinkered with my new HMC40 on it, but only briefly so no footage to show for it... but I've used the BH-220 for two years now as a photo aid with my Nikon SLRs. I highly recommend it! Get the version without an SLR cable release though. It'd be silly to pay 2x the price for a feature you have no need for.
Thanks for the kind words, I was feeling sort of bad about my hand held shots. Given the speed and movement of the models, I'm not sure a tripod would have worked. I do have an idea I want to try for a "poor man's steady cam" rig, it might even help.