Carb crossover 1-4/2-3 or all4? Ivan's MB with full akra

[Motopsycho87]

To me it feels as though it's slightly lean for that revs (and with CV carbs surely the slide is at a similar position each time?)

I know it's a completely different kettle of fish, but I've jetted my 300 2 smoke perfectly, and it feels like a lean condition on the needle, not the 2 stroke "booowaaaahhhh" noise, but just soft and fluttery I suppose, no crackling or bogging...