Well I maidened this little jet with a Tower .75 and an 11x7 APC. I was running 10% fuel with shimmed head. I had the engine laying around so I figured it was a good candidate. I had just rebuilt it so it still needs run in so I was running very rich setting. Unlike some members speculation about what to use and what's right for this plane, I recommend this proven combo. I had unlimited vertical and it was truckin. On take off I went straight up. I flew at half most of the time even with the rich setting. 5 clicks of trim and it was flying like a dart on rails. I didn't install retracts yet.
As far as CG I balanced it at the recommend 260MM with 2 battery packs in the nose compartment but that actually proved too nose heavy. I would also recommend scaling down aileron throws as it gets sensitive at speed but I was nosy heavy.
I lost my muffler in flight and dead sticked into a small bush and grass. Damaged the wing a bit but this is a tough jet. I did reinforce the mounting locations for the booms and blocked the wing and fuse and installed a carbon plate across the bottom of the fuse/wing to hold them together. This proved and effective and easy install for that. Just plywood blocking, carbon plate and 4 screws.
For the fuel system I added a 2oz hopper tank for extra fuel and good fuel delivery, both tanks mounted in reverse with reverse clunk, bubbless clunk in main tank.
I hope this information is a benefit to anyone building the jet or looking into it. I hope they keep the price the same. I would buy another for a spare.