I've seen 'Bob's racer at Oshkosh twice and while at the show they did some demonstration air racing. Of course they had to basicaly keep withing the confine of the airfield so couldnt really open up those motors, but oh.....the noise....fair sets the hairs on the back of your neck standing to attention !!!
Here's a link to Bob's website..
Odegaard Aviation Inc.
Bob is also a gentleman and will always spare the time for a quick chat.
And I think 'Duggy' is brilliant !.