lasmacgod
ArboristSite Operative
Yes, the 501SX looks like it is a step closer than the 490 and 500ES. I have posted about it here a few times already.
What I don't know is if the saw called 500P in the US is the 500ES or the 501SX - or a third variant....
What I have seen from the IPL's is that the only difference between the 500P and 500ES is the lack of limiters on the carb adjustment screws on the 500ES. I have not looked at an IPL for the 501SX to know what the differences are there.