Bobby,
I got to fly the Hellcat yesterday. Light winds, so I got some minor control adjustments made. Elevator control is sensitive. The 122 mm cg is at 28% MAC. Added negative expo (Futaba) helped. Changed to the Xoar three blade 18-8 prop. Looses a little performance compared to the 18-10 two blade, but still ok and better than the G-38. Did all the warbird maneuvers ok and no problem doing large loops. 18-10 two blade turns 7,500 rpm, the three blade 6,950 rpm. This should get over 7,000 rpm with break in. Only four flights on this engine.
The ESM Hellcat and the DLE 35R is a good combination. Only problem is getting cg correct. Next is paint and installing a dummy radial and doing it so the cowl can be easily removed.