Ya I agree with those who said k4900 amazing design in tube and 4600 flyback is a hammer which i love never breaks but that coil is a pain, I find putting a tooth pick inside keeps it solid straight and some crazy glue and works like a charm. G07 i feel has most parts available however picture color quality is terrible compared to a k4600 I noticed comparing side to side. I use to repair the chassis but now I send them out to Tony Easton and bullet proof for another 40yrs.