First post here and you are already picking fights, eh? If you wanna debate law suits and power tool design elements we can go round and round about that, especially with John Deere and the lobby for EPA laws on saws in the US, clean burning 2-stroke technology, AV, air filtration, ignitions, porting, yadda yadda yadda... in the end as a consumer, does it really matter? Or are you just trolling here for a fight? Various forms of variable and auto-tune have been used for a long time in lots of types of engines. Stihl has the auto-tune M-tronic out there now, its already on the market. Has been for a long while. The 562 is a good saw, but it has an inboard clutch. What are you gonna do when you pinch that bar in a cut? Or if you just want to swap out rims on the fly? As I have said many times here and elsewhere, inborad clutches generally suck. Why Husky sticks with them on saws like the 346 and 562 is beyond me. The 576 also has a coil limiter in it, so it does not have the power that it could. A tad more power than the 71cc 372xp (same power as the74cc), smoother AV, heavier saw than the 372 though by over a pound. WOW!