The float bowl screws that have caused so many of us gnashing of the teeth are in fact not junk. The problem is we aren't using the right screwdriver!
What to use is a J.I.S.(Japanese Industrial Standard) no.#1 phillips, which is a lot different than one of our number 1's. It doesn't matter if it's a Snap On, etc., if it's not a J.I.S. no.#1 it's the wrong screwdriver.
They are available at lots of places, I found mine at a hobby shop that had them listed in their catalogs and had several J.I.S. sizes,including the no.#1.