I feel like its more of a one off custom. Like you could get from JPF, or MJW, or HTH. Only because it's his it's now a signature amp, but I also feel like Chappers decided that was the case and Martin Kidd like you say, is along for the exposure. As for his playing, granted he's better than me, but a wise man once said "You might have a little bit of lightning in you, but you're missing everything else". You say tomato I say... whatever.