2 out of the three you named run alcohol burning cars,while the other has retired,but how about jim read,andrew cowin & steve reed,all who run rails using nitro.the difference between 98 % nitro & plain methanol is vast,& is easily detected by engine note & exhaust smell.love the smell of methanol,but nitro fumes are beyond belief. a friend of mine used to run top bike in the 70's,& it actually went faster on 3 cylinders,as he suddenly got traction,not 1/4 mile burnouts maskerading as runs.