Believe it or not, "customers using bad tubes/inserting tubes wrong/using wrong tubes" is a top 3 tech support issue, and probably the leading cause of products coming back for service, at least since most of the USB/Windows drivers issues have been cleared up, and since we've moved to octal tubes (inserting a noval tube wrong is not easy, but hey, we've seen octal LISST inserted wrong--which is a ceramic key in a ceramic socket, wowzers). So yes, we're hypersensitive to it.
We're also hypersensitive to getting in the middle. Imagine this tech support scenario:
Customer: "Hey, my new Freya+ doesn't work/is noisy/is dead/is imbalanced in tube mode."
Us: "Cool, is that with the tubes we provided?"
Customer: "Nah, that's with some superunobtainum hand-rubbed Russian monk tubes that cost me $8000--"
Us: "Cool, can you try it with our tubes?"
Customer: "Sure. Hey, it works fine!"
Us: "Hope you can track down that monk."
Now, imagine it if we didn't provide tubes. Yeah, that's not pretty. Customer gets pissed we insinuate his hand-rubbed tubes are sucky. Tries 10000 cheap tubes he got on ebay. Nothing works. We bring the product back, it works fine. Lots of time wasted. Nobody happy.
So yes, EVERYTHING ships with tested, matched tubes. Sorry if that offends you.