I used the Power 46, but went to great lengths to take weight out of the plane. If I did not make some series mods, the plane would have been 10 lbs and underpowered. I have read some posts where a Power 60 was used, and the plane was about 10 lbs and was still underpowered.

So I did a weight and balance and determined that the 6S install did not gain much because of weight growth, and I only had a 4S battery.

With a 10 oz sound system, you should put EVERYTHING you can in the cowl. I had 16 oz of speakers, and ESC, and amp in the cowl with the Power 46.

If you can mount the 6S battery vertically against the firewall, this also helps with CG. I was able to get the 4S battery through the firewall and between the engine mount. The 6S will not fit this way.

I also replaced the control rods with 0.07" Carbon rods. This is a big help, but a little work. Also, I mounted the elevator and rudder servos as far forward as possible. I think they are about 5" forward of the stock position. If you need to add balast, start by gluing weights in the dummy engine, but not more than 4 oz. here as the cowl may not support much more.

The Eflite Pro 60 ESC is a great unit and will easily handle 4 standard servos. Mine are digital. I am using this same ESC on an Eflite Beaver with 6 mini analog servos with no problems.