Well I managed to get my SSD WOFF to work, and I get greater frame rates than before. I think the fault was something to do with my installation of DirectX 9.

So I got it to work and then set off for a flight. I got separated from the others and was happily going home when I was told to wait for the leader to catch up. I did that and then I think he (or someone else) ran into me. Now 9 days in hospital sicko

As I thought I was dead I suppose this is better.

Just out of interest, after landing a DH2, look over your shoulder when you stop the engine. The cylinders and the prop stop at different rates which is impossible with a rotary engine. As it's not a real engine anyway I don't worry about it too much.