I don't know mordy but it would be a very good idea, given how good they can sound.
Thinking generally, I appreciate that some of the tubes we find very good for Elise will almost certainly not all be suitable for Euforia, but I've been listening just now to EL12spez powers with EL11 drivers, all RFT's
, and I can't imagine how this combination of sweet clarity and huge sound-stage wouldn't suit Euforia too. Would probably sound even better, hard though that is to imagine.
I've also been trying to determine what exactly is the difference in sound between the different manufacturers and shapes of the EL12/EL12N type of tubes and I'm finding it very difficult.
For a few days I thought Telefunken and Valvo were a bit warmer than RFT/RWN tubes, today I'm not so sure.
Same with the coke bottle ST and straight N's. I originally thought, like most, that the N's were a bit brighter, but, again, now I'm not so sure. Sometimes I think the N's sound warmer.
I'm wondering if it depends on the accompanying driver/ power tubes as well.
So far, I think spez are a little warmer again than the other two, but that will probably change too.
Maybe best not to bother too much about all these differences, they are not big anyway. I'll just enjoy the music as they all sound so good.