Good point. The M3s I borrowed were SEs. That was "one model back", right ? Was there any acoustic change or was that the revision where they changed the manufacturing process so the front edges became more angular ?

M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8