Nice Machine! The engine longevity, noise and fuel consumption is one
of the rotary engines only drawbacks. Yet they have many positives.

When I was in Sydney last year I saw a single rotary engine rx7
its a custom single rotor 13b which had its e shaft, counterweights
and rear bearing modded to run a single chamber.
He had it dynoed at 115hp ate with a downdraft 45 or 48mm weber and
his fuel economy was almost double the twin rotor.
With further tuning and extend porting he thinks theres another 30-40hp
this could have been a good direction for datsun at the time as the single
rotor would have been economical and more powerful than all A series.