I'm happy to start a feedback thread for Mark who I met up with this evening. I was seriously tempted by the Markbass CMD121P he had up for sale so following the exchange of a few messages, I collected the amp from his home. I found him to be polite and courteous throughout and a very friendly guy. If it wasn't for social distancing we would probably chatted for hours. Nice to meet you today Mark and the amp is awesome. I would deal with Mark anytime without hesitation.