I built a KFm-4ward on yesterday and just flew it today.

I put a ExceedRc Rocket motor on it with a 7x5 Master Airscrew prop and a 1800mah 3S lipo. This setup gives me over 200W at 20-25A. The motor can take 30A but max efficiency is only up to 18A. Balances nice and flies smooth on low rates. In this video I'm flying at 50% aileron and 60% elevator so it flares nicely at low speed landings as you can see at the end of the video. On high rates (100% throw) it will turn on a dime but I don't want that much throw when getting to know my planes.

It is a gentle giant on low rates and very maneuverable on high rates.

Here's a video of todays flight and some pictures

48" KFm-4ward (3 min 57 sec)

This is a nice flyby filmed Dec 17

KFm-4ward flyby (2 min 0 sec)

flys not to bad