Now that you have made the gauge, it seems like a good idea to use it - it works on any WA or WT, as I understand it. Then having set the lever correctly, you can check whether the lever height does correspond with the nearby flat surface on the carburetor body. On the WA, the flat surface does work, and that is the way I set WA lever height, but WT is not quite so straightforward because there are variants. That seems to be why Walbro recommends the tool, which works for all of them.
For future reference, remember that your tool is for WA and WT: some other models use other dimensions for the distance between the top of the lever and the height of the carburetor body.
Referring to a couple of posts ago, I think it is well worth persevering with getting this carburetor, and this trimmer, working properly. You are learning something as this goes forward. You never learn anything by giving up, you just lose confidence in yourself.
