ATC with TB-88cc WOT bogging

I have an ATC70 with the TB 88 big bore kit and it never ran very well with the Chinese carb it came with so I put a mikuni VM 20 on it after some recommendations.
I've got the idle and pilot jet nailed down but it was still really boggy mid and upper throttle.
I moved the needle down 1 notch from the middle and that improved quite a bit but it still bogs at WOT. I bought 2 different jets kits and it seems to run best with the 185 main but still bogs. I've gone up to a 230 and didn't go further because it ran terrible and the same when I drop the main jet below 170..

Im beyond frustrated with this thing and hoping someone can offer some advice..