What is the carburetor model shown in your article and can you get a refurbishing kit for it? It's the same as mine.
I had a conversation with a reader called Mike about 15 months ago, and he reckoned the carburetor was a Walbro wyl series carb. Search for "Mike" on the page and you should be able to find it. He got a rebuild kit for the trimmer and it worked ok.