Yes, there is no compensation at low throttle settings, so you need to add an airbleed or notch the throttle drum for instance. I have a fixed airbleed on mine.
If the needle is far out then you might have a problem with a partially blocked intake hole in the black plastic (where the fuel line attaches). On mine the hole in the plastic was very small (needs deburring) and it didn't line up well with the groove in the brass needle holder. It has been some time now, but if I remember correctly I deburred/drilled out the plastic part slightly (by hand) and widened the groove on the brass part (in a lathe).
You really do need to check absolutely every single thing with these engines...