One did leak at the HSN at one point, but a thine layer of ATV-silicon applied to the out-side toke care of that. (I´m not to found of the alu-washer)

I did hear about some people that used Novarossi carb for Picco, and that it worked quiet well. According to them it became easier to tune, but with slightly lower on power.

I want to be able to control the mixture more precise over the entire band and I don´t have any fancy flow-bench that I can run tests on.
So a carb with 3-needles could allow me to fine tune it better, it may not give any extra, but then again maybe it would.
I could also buy some more LSN to mod, I did it some times when I used old SU-carbs on engines I used to race (full-scale).

I´m will start to break-in the new engine and try out some pipes first.

Thank´s for all the help, greatly appreciated!