Sorry not a great photo....
The figure is calculated at the flywheel on run down from the road. There can be a lot of variables in this and it does all depend on how a rolling road has been set up so I could go to another RR and make more...or less...all depends.
As for sold, it "might be" I took a deposit on it today so we will see if it pans out. I decided to move it on as I was keen to build another track project but couldn't justify having two track cars and needed some extra funding for the new one. In addition, Silverstone left me a bit dissappointed with the car and I've been giving myself a hard time over it. It was clear I didn't know as much as I thought I did and to get the 180 where I want it to be wouldn't be cost effective. So, I put it up for sale, kind of hoping no one would buy it and I could then justify spending a shed load more cash on it and getting it where I wanted it to be...it backfired on me as I have had a lot of interest in it.