I admit it. I am a slooooow builder. I bought this last year at Joe Nall and have worked off an on (more off than on) since May of last year on it. In my defense, I have completed several other projects in that span. I think this will be a sweet plane when I get her finished. I still have to set up the carbon control rods and install the remaining linkages. All up weight is 4lbs 15ozs ! Power is an OS .50sx with an Ultrathrust muffler. Took a little work to build the tunnel for the Ultrathrust, but I think it will be worth it. Kit was really well enginered. Instructions were a little sparse...Nothing that couldn't be figured out. Thanks to those of you who helped with thrustline placement. Hope to have her in the air by the end of the month. I'll let you know how she performs.