ORIGINAL: gkamysz
No! The main needle is not doing all the metering at part throttle. It has some influence but it is not the primary control.
Both of you have to realize that both needles influence the part throttle mixture.
Greg,
While both needles do have an influence on
the flow of fuel all across the RPM range, the high-speed needle has absolutely no effect on the part-throttle
fuel metering.
Its influence is fixed; not variable, which it needs to be to affect the metering.