Just reread the entire thread. Your comment that the idle mixture control screw must be turned in further than normal indicates issues OTHER than too large a main jet, as fuel for this circuit is NOT dependent on the main jet. See my previous post.

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