RCGF 20cc Twin Head problem
I have a new RCGF 20cc twin. The spark plug is 1/4-32 and I cross threaded one. I thought, well just get a new head and throw on. The head is the 10cc SE. I have broken 3 rings trying to get it on. Any tips on getting the head back on without messing up the ring? I have 4 more on order.