Cheers Chris. I'll have to head to the dealer and suss em out and report back my thoughts. You'd think Sthil would at least get the specs right. What do you like most about the HLA135K and does it justify the extra weight? Sthil claims that it prunes and hedges, what does that mean?
The reason I asked about the blade changes on the HLA66 v HLA65 was this youtube clip.
https://www.youtube.com/watch?v=HvcnlU5QsZE
It looks as if the HLA66 has narrower teeth on the top blade and thicker teeth on the bottom.