Hi Dan, nice to hear that I am not alone. I think you posted a vid and it looked like you were doing great on the 450. I also have the Arriba Arriba board, though I'm not sure if it's the same one as yours, as mine is only 130cm. I'm sure the strap positions are the same, though. For me this doesn't matter too much as I am riding strapless. So I'll just put my feet where they need to go (once I figure out where that needs to be). If you find the answers, I'd be keen to hear it, and I'll do the same. I'm sure it's just about getting the hang of a foil with a completely different feel. Hopefully I'll get out again over the weekend.
My mistake, my board is 130cm, just like yours. I went for another session today on the hp560. Second time was way better, I hope the third time is a charm.
Besides the need of extra front foot pressure, compared to the FR425/450, this high AR wing needs more speed to be stable. On the Free Ride wings we get lift at very low speeds, and it is a little bit different on the race wing.
Today I´ve reached 41 km/h (22 knots) with the hp 560, and it is scary, because it is still hard to keep the foil from jumping out of the water. Also, I was going downwind towards the beach, with high tide and waves... I think I can go faster once I get more confortable riding fast. Be prepared for a new set of bruses.... I had forgot how painful the learning stage was... I was going too fast when I crashed, but despite I've jumped away from the board, it still hit me on the back, and it is really sore now... But still, better then hitting my head. I think I will now consider using an impact vest and a helmet.
Let us now how you progress on the HP560. By the way, where are your riding spots?