I ordered the performance kit from canada for mine a few years ago. It comes with a 16” picco bar, rim, and 3 63PS chains. It flies through wood and is a limbing light saber.
I bought the picco kit from the UK last year but have never mounted it. I got a 241 a week after i bought the kit so i just kept the 261 with .325. It has the 16” bar, rim, and 3 PS chains.
It’ll adjust to the new oil and fuel while your using it. The reset helps with starting issues, idle issues, bogging, etc. Anything you would need to adjust a manual carburetor for It will do on its own.
Why wait 10 days and risk a major infection. You can see its dying already and is gonna have to come off so they should spare you the pain and risk by just removing it so you can get on with healing