Nick wrote:
Just a couple of comments on Stihl saws generally which are entirely my own
preferences: I don't much like the quick tensioner, I've found it can slip
and allow the chain to slacken (when it gets a little worn after several
hundred hours use) but not dangerously so. I much prefer to slacken 1 or 2
nuts and use a screw tensioner, this takes but a few seconds and gives one a
better feel for the chain tension.

Those are exactly my thoughts about the quick tensioner on my (OK,
much less 'professional') Bosch electric chainsaw, it's much less
easy to set the tension than the 'old fashioned' screwdriver and
spanner adjustment on my older and smaller B&D chainsaw.

--
Chris Green