Today I balanced the carbs a little more, idles little nicer now.
Then we adjusted the ignition timing some.
We tried to adjust the Powerspark soft cut rev limiter, but I'm not quite happy of this product. Probably gonna order a FMI (Finnish Motor Instruments) rev limiter some day. I already had one spare, but a stupid me sold it last fall.

Engine is working quite well now, only little downside is that when cruising with very little throttle opening the AFR gets too lean and it sometimes gives a little spit out of the carbs. Seems like I need to fiddle still some with the idle circuit.

Took some better pictures today on the daylight: