Can get my mixture rich enough- Weber 44 IDF Options

[tornik550]

Just installed a innovate air fuel gauge. I have always suspected that my mixture was lean. The gauge now confirms it. At idle my readings are about 10.5-11.5. At 4k rpm the readings are about 12. Of coarse, when I let of the throttle, the numbers go up to around 13. I have played around with the setting quite a bit- the changes do make changes however still not getting me close. Here is what I have-

dual weber 44 idf's
60 idles (lean even with three full turns of the idle mixture screw)
150 mains
190 air
f11 tubes
(I don't remember what I set the float height to- 11mm? however I don't think that would mess up my idle mixture?)

2258 engine
scat 45 cam (.507 lift, dur 262 at .050")
9.5:1 CR
2.0l heads 44intakes 38 exhaust

my three theories-
-just need to keep going up on jet size (just seemed like mine were getting a bit big)
-float issue may actually effect idle mixture? (doubt)
-possible that my gauge is wrong. I see no reason to believe that. I had just calibrated it and it is installed correctly according to the instructions.