there is a saying about rotary engine: new car kicks ass, old ...
All I know is I kick people ass. 12A Sweet ass, 13B Kick ass, 20B Big ass, 26B Shake my ass, 38B Burn your ass.
If people don't know anything about rotary, please learn first before you buy.
If people know too much about rotary, Just buy it.
If people know sth, but not sure, Just forget about it.