Hi!
I use two of these engines in a Marutaka DC-3.
No silencer pressure used. Throttle is instant and engines are very reliable.
I use 5% nitro and 15% all synthetic oil (like most other fellows do over here).

Props are custom made, 3 blade ,carbon fiber 10x5 props. Rpm with these is around 9500-10000rpm.
Tanks (110cc) are tin. Set-up with Uni-flow.