</font><font color="blue" class="small">( "quick tensioner" system, which is essentially a plastic flip out "wingnut" )</font>
I have this on my 018 Sthil. It works perfectly, but you have to be careful and have the mounting plates clean and tension correct. You must also hold the bar nose up when tightening the big wing nut. If you have the small saw with .043 gauge chain then too much tension will stretch the chain.