Stan.
We do not have the space (length of tracks) to test cars that well before we have to crate them up and send them to the USA. What looks good on our airfileds may not work straightaway once it reaches America. Think 'e=motion' the electric car in Nevada and now 'Inspiration' in California. Even the rocket bike had only made four timed runs in the UK during the British Speed Attempt before it was taken to Bonneville.
I feel sure that the 'keep it simple' principle could be applied to many projects but in doing that no great progress is ever made. A Stanley boiler and engine would probably go quicker than the 1906 record in a modern construction but engineers have to push forward. This team are seeking 175 mph.
Whilst team members would have experienced watching the racing at Bonneville I think only Jerry Bliss had experienced any lerngth of time on a US desert, having been with Thruist SSC programme ten years ago at Black Rock (and testing in Jordan).
Malcolm