VanHai
500+ Head-Fier
Ah okay.
Here's some well-intentioned advice from me.
As Ultimate is also extensive.
For driver tubes, stick to what is common and no adapters are needed.
The only adapter you should use is the 12xx7 to 6sn7, because you can use 12au/ax/At7.
With this and 6SN7/6SL7 and additional 6J5 you are well set up for now.
I would ignore everything on the list that works as a driver tube with adapters for the first few months until Ultimate is installed and you are familiar with it.
Thank you for your advise, maybe too late. I am set and ready to go.This is not a bad suggestion but if you already have both tubes and adapters it can be difficult to follow. But you don't need to buy a lot of tubes in advance if you don't have them already.