RE: KMP's L-4 Grasshopper
Hello mormon Mike. I've got a Kmp L-4. Looks like your J-3. While assembling mine, both the 0-rings on the LG broke. I should mention it was over night. Just the fuse, and two servos. No engine no windows no wings no struts. Are broken o-rings an issue, or did I get some defective ones? Please advise. 1builder