Thanks for the pictures Sonnich - Your pond seems to be bigger than ours - looks nice too.
If you have your front planes level do you just dive with the rear planes? I've put some pictures on so you can see how mine sits in the water - providing that I've got a good speed (no weed fast) I manage a dive OK - but if the boat isn't going too fast the rear dive plane makes the boat cavitate - perhaps I need a bit more weight.