Before I used the picco super chain on my 261 but now I have switched to this chain, the picco is good but this is better. It’s the best chain I have ever been using and I have been using some. It’s sems to me that it needs some hook to cut fast but so do all the other chains to. At New the theets are pretty tall so the first times I sharpening I use a 5,2mm-13/64 file and then the 4,8mm-3/16 this size file can be used almost to the chain is worned out but in the end I think the 4,5mm-11/64 will work better. I use Stihls New progressive raker guide for the chain.