The A85 is CAT powered so I don't think there will be any concerns with the engine. My neighbor has dealt Massey rotaries since they've existed and has had very few major problems. One "sluggish" Cummins which was recently traded for a SISU powered Massey (again, he claims slugish and thirsty) but, machine-wise, he's had good luck. He trades about every 2000 to 2500 hours.