I have a LOT of respect for both Denny and Tim, so will not post a rebuttal; however, I disagree on the issue of fuel going bad (E0, and E10; have never used E85).

Jon.

Good carburetion is fuelish hot air
The most expensive carburetor is the wrong one you attempt to modify.
If you truly believe "one size fits all," try walking a mile in your spouse's shoes!
The Carburetor Shop