Marshall TSL100 JCM2000 - How to change tubes and Bias with new Reverb Tank

A not so short, but simple video on the service I did on a Marshall TSL100 a few weeks ago. The customer wanted new tubes as well as get the reverb working. The reverb was easy. The amp cabinet was void of a reverb tank. Being unfamiliar, I thought it was perhaps a digital reverb, but no... it is solid state driven via some IC's but it is driving a real reverb tank. Power tubes were swapped, the amp was biased, and the customer is extremely happy with the amp. This is a classic example of preventative maintenance, unlike the Blackstar that came to me the other day which I didn't end up recording. The power tubes had simply failed and caused the amp to misbehave in a very predictable manner.