New Valves for the Mesa Boogie Studio Caliber DC-2

It's a DC-2; I mis-spoke on the video. This old and battered amp has been reasonably good sounding so far (6 months of use), but I had a feeling the tone could be improved. Here I fit new power tubes (thermionic valves) from Watford Valves, UK. And I play my Les Paul through it, to see how it sounds. The Les Paul is from 2016, not 2006. It's one of those days for small mistakes...