You'll need lots of nose weight to balance it. When you mount your turbine and equipment make sure that you move everything as far forward as possible to minimize the amount of nose weight you'll need. My engine is a Wren SS. Rather than adding dead weight I went with redundant Rx batteries (about 170 gm. each) as far forward in the nose cone as possible. Behind them, just behind the nose former, is my 340 gm. ECU battery. My CG is at 145 mm.

Joe