"Given that Weber jets don’t particularly wear"
I have some antique idle jets stamped EW. These idles do not perform where they should on the Shankle Automotive diagram. They lean out. The new ones above and below where these antiques are perform as the Shankle scale says they should. I tried cleaning them, gently, but unsuccessfully. I suspect corrosion or gunk or a different grading scale.
So I think they can "wear out."
Don't buy those F16's. Contact Keith Franck and buy some VF tubes to try out. I want to find out how well they work. Venturi Fountain Tubes You might like them better and can let us all know. Thanks in advance.
I just found this remarkable work to read for your interest:
I made this table and chart while working to tune my 1750 with DCOE 151s I've been experimenting a bit again and resurrected it. It might be of interest to folks here. Rather than just do what others have done I read up a lot on how the webers work, what circuits are used when and general...
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