I have been tinkering with the idea of usin the mosfets and have both the erf and 520 kits. I have intalled one in a very good peaked and tuned cobra 29 ltd classic. I put it on the meters and the dk dropped to 1 1/2 watts and peak was around 24-26w. Before the mods the numbers were dk: 6 1/2w and pk: of 22-24w. The mosfet definitely increased the modulation,but messed the settin of the swr's. I have some people I know claiming they are getting 35-45w out of the same kit. So the big question are my numbers correct or are theres with 13.8v supplied and using the 520 kit. Also how much of the actual mosfet mod is harmonics, I have a scope but no probes and need some tutortials to use. Thanks Dave