Not hugely carboned, but some yes. I haven't checked plugs since then.
I have no balance tube, and I only just today received my carb synchrometer, thanks to a backorder. I want to say that I'm getting exactly 20 MPG right now, but I want to go get gas and make sure, because the gas gauge is not 100% linear. I am pretty sure its 20 even though. This includes SOME WOT stuff but not a ton, and I might be in the secondaries on the freeway I'm not sure, because I dont know the vacuum numbers on this. I cruise at 3400 about on the freeway unless I dip under 70.
I want to play with the jets more though.
It is also possible to get poor MPG from:
Worn throttle shaft (vacuum leak I guess)
Dirty emulsion tubes
Plain old clogged jets
I dont imagine the lack of a balance tube is helping, and I have no idea how out of synch these things can be. Exaust odor was way down, almost not there, that is what I noticed more than anything I could say about part throttle driving. It may seem better but not enough that I really took note of it. Also, I have a 75/60 setup, probably not optimal but I need an overview of the left/right side of the idle circuits to figure things out which I will study tonight after the gym/gas trip, and then try to tune them tomorow hopefully.