Gtx, is that an entire lower wing glued on under the main wing?

Here are dreadful sketches of the cg finder I'm going to build. I'm going to take 1/8" ss, put a pair of rods parallel at 37.5 degrees, they will be attached to a base of some sort, or triangulated. This should allow me to put the airplane on the rods to determine CG. I think what was described in earlier post was a way to find center of mass. I had not thought of that before. Please note, the crappy drawings I made are very similar to what I get when I'm building prototypes or custom products. I guess I've learned to decode these things, and in the meantime am now used to drawing this way. Tim