Big_Wood
westcoast dweller
We use them at work with a 25" on very hard gums, so far they are better than the 660, as reliable with more power and less vibes
The 660 is a legend here
If they are as reliable there's something different about them between Oz and here or your not running them hard enough lol 25" is about the longest I'd run on them with stihls sad excuse for spring AV.