Here is my www.3dfoamy.com KatanaS. It uses 4 HS-55's, Hitec feather receiver, E-flite 370 5400, Jeti 30. This thing took FOREVER to build. I had to cut it out using a hobby knife (since im 15 and don't have access to CNC machine )...This is the first one i ever built from plans.

TTYL,
Andrew T.