All, Had another opportunity to test MFTTY on air today. As expected, sensitivity goes hand-in-hand with character speed and the slower 1/8 mode is probably close to what you might expect from say PSK31.
Path simulations seem to indicate that the mode is probably more stable than PSK31 when HF path distortion becomes an issue. I'd appreciate any thoughts / experiences with MFTTY performance; slow vs. fast mode etc. Tony - K2MO