That's pretty cool. Like you, I love tube amps. I still play through them for the most part. However, I have done a couple of gigs on my Quad Cortex run through a Line 6 Powercab +. I hate to admit it but it is pretty damn good.
While playing through tubes mostly, I have a back up system that I carry. I picked up one of those Carvin 100W stereo pedal amps a few years back. It seems similar to yours except this one is nothing but a power amp so I also carry a POD Express, so if amything goes wrong I have a complete amp and FX that fits in my hand. I actually had to use it at a gig once and it was a relief given that my recurring nightmare is one where I am on stage about to start and my amp isin't working. I fully accept that there my be a Freudian sexual interpretation to the dream about my equipment failing but I think it is about my amp.