When I was flying DF I used Picco 80 quit a bit.
The first thing that is going to happen is
the carb is going to loosen up or fall off... heheh

I found the higher nitro helped the idel.
But if you can get an OS carb (I think it fits perfect)
that will make all the difference.

What ever carb you use be sure to blue Locktite
it in everywhere or it may fall off..

Those are good engines, very powerful but
they take some time getting right.
I ran one with a 10x8 prop at around 18k
and it flung the blades off..!!!

Eddie Weeks
http://www.corpcomp.com/weeks1/