Hi Jame,
I don't know if a picture says a thousand words or not but here is the installation of my Wren Supersport in the CARF Flash with Single wall wren 620mm pipe and trick engine mount.
I have had two flights so far power is good and large loops and avalanches from level flight are possible it also point rolls and cubans no problems as well with the Supersport.
I got the airframe from a guy in Twickenham (Skywarrior on RCU, i think). He modded the fuz tank to remove the flat bottom and put in a small sump. With the engine mounted this way and all three li-pos right up front i did not need any nose weight to obtain the recommended c of g.
I don't use a wing tank and have the timer set for about 6 minutes.
I bought the Dreamworksrc flash gear which is Bomb proof! The trunnions are wider than the standard set-up and a bit of Dremelling is required.....any questions just ask?
I have to say my mate (flying scotsman on RCu) has a p120SE in his and that really does set the heather on fire, the superport is fine however.
Brgds
Dave K