I attempted similar stuff on my IS300 but if the input doesn’t match what the ECU expects it freaks out. You say you don’t like the DBW in the Twins, you should see how bad it is in the IS300 or the Z/G3X or Porsche. The Twins have by far the best DBW of any modern cars I’ve driven.
So, I guess you still haven’t played with the TIR tables.