Not Thottles----
---technically they are Thrust Levels, and tell the FADECS how much thrust is being requested by the pilot.
The biggest hassle is in the cruise. We cruise (EMB 145) at M0.76, and MMO is M0.78. Unfortunately as the Mach no.'s are determined by the ADC, a change in SAT of a degree or two can be enough to have Miss Brazil shouting her head of at you, followed by some unwanted paperwork !
Not flown the Legacy version, does that have autothrottles?
Ape