2020 Stihl BG86 blower Hi speed screw adjustment tool

[6012HD]

Hi:
I have a 2020 Stihl BG86 blower that needs the Hi speed screw backed out just a hair,as the rpm fluctuates up and down on full throttle...problem is,I need the special shaped tool and it's not the normal 4mm hex,but a octagonal shape.Seems that Stihl changed up the air/fuel mixture screw heads on this 2020 model.
Loads of multi shaped tools on Amazon which include the 4 mm hex,among others,which I bought but had to return.
Where can I buy this octagonal shape(8 sided) tool.I don't think I can order one from my dealer.
Not really looking to do the hacksaw blade hack just yet.
I could take it to my local dealer,but that would be too easy.Thanks,6012HD

 

[Justin Taylor]

Don’t mess with it, the blower is 4 stroking a little bit which is perfect but annoying

 

[6012HD]

Thanks,but not quite sure what you mean by "4 stroking" and why is that good?
*EDIT* I found a few videos on YT explaining it. Thanks.