Lax

I used a AXI 282610 with 4S lipo's and a 14x7 prop on my 4.5 pound Modeltech Magic and had unlimited verticle.

The Bigger 413020 takes a lot of batteries (8-10S)and a large prop (16-17 inches) to get high watt yield. I don't think a 8S lipo pack is do able even with some Kokam 3200 mah 20C packs in series. There isn't enough room inside.