I have the plane assembled and waiting for a paint scheme to appear. At this stage it weighs 27 ounces. When completed and with the battery installed I figure the weight will be high 40's low 50's range. I can't say using molded turtle deck pieces instead of carving them out of blocks is any lighter or not. They should be but I don't see any big weight savings. What is saved is a lot of carving. The results are the same though. I have one that I scratch built about 10 years ago so I can compare weights. In my experiance electric power is heavier than and engine with fuel. So if the new one is lighter than the old one it's a win.