Pete, I had a play with skyx at pmrid's place last weekend. To do a tpoint run, I think you will need to set skyx to use maxim as the camera so skyx has camera control then run a tpoint mapping session from skyx.
We got skyx to connect to maxim and the camera, but it hung when doing an exposure. We got it to start ccdsoft for camera control but it wouldn't startup a camera connection. I don't think he has got that going yet either
I also read somewhere that you may need a larger star cattledog like usno for solving to work as expected. I don't know how true this is, we didn't get that far.