For my 090 and 070 running .404 chain I set the depth gauges at .030 on Stihl chisel chain for most wood species. If the carb is set just a tad on the rich side these big saws make their most power/torque for pulling chain. I don`t push down on the front handle at all and the weight of the powerhead will set the pace for nice smooth cuts without stalling the clutch. If the carb is set leaner the engine will rev faster but lack full power, these saws don`t rev high but will cut very well with a good sharp chain. In the winter here when the wood is frozen I can lower the guides another 5 thou without problems but for the warmer seasons I like the .030 the best, the chain is not so grabby and it cuts more smoothly on the 48" and 60" bars. The throttle should always be held wide open when the chain is cutting, that keeps the clutch fully in contact with the drive drum, you don`t want the clutch slipping, it makes a lot of heat that can damage the crank seals. The light 4 stroking can be heard when the throttle is held wide open and the chain is not in the cut, the 4 stroking clears away and a nice even powerful sound comes on when the chain gets loaded in the cut, the saw is tuned correctly when this occurs.