Emulsion tube / Needle jet

[Keg]

I am running an 07 EC300 with a CEK on the bottom clip (or CCK in the middle clip, 42PJ, good idle, great response, just revs lean at 3/4 throttle.)

In an attempt to richen up the 3/4 to full throttle I have used everything from a 170 to 195 main jet.

But there is little change. Could it be that the needle jet is more restrictive than the main jet in it? I am about to take some sandpaper to the needle to see what it does.