Hey John,
Another great run!
Congratulations on reaching the 50 million point milestone.
Yes, the Time Adj and Difficulty settings can easily be confirmed by the gameplay alone.
For this submission, the required Normal value has been used for both settings.
With a few adjustments (boost start at the beginning of Stage 1, double or triple median crossover on Stage 5, maximum 293 km/hr for the entirety of Stages 2 and 4), both you and Eddie are capable of taking down the world record.
After more than 34 years, it is time for Richard Jackson to be dethroned. Why not by one of you?