MOGZV,
The idiot diodes in RM's are almost useless, you are a very lucky chap if reverse polarity does not take out the pa transistors,
The fuse holders & fuses don't hold up to the current the amp draws @ full power fm which is almost 50w less that RM claim & 150w less than they claim for ssb output,
people pester until i give in & pay me to remove the fuse holders in rm's & fit a correctly rated inline fuse,
Trying to squeeze out what RM claim on FM results in feedback resistors getting so hot they burn or fall out of the board,
They also pester & pay me to swap the 2w resistors for 5w resistors,
The kl400 is really a 100w amp, at that level everything holds up and they are reasonably linear,
They look pretty and work ok if used sensibly, The dave clones are fugly no doubt, making them pretty won't improve how many people you can talk over,
I have keyed a very similar amp on 18-19v against mates trying their best with their RM KL500'S, I have never lost a keydown.