Hello rpdz,
I did a search here for Re-tubing a Triaxis.
I found many threads here. Timberwolf has many Posts about this.
He strongly recommend the following.
V1 - 12AX7
V2- 12AT7WA
V3 - 5751
V4 - 12AX7 Different to V1 as they blend together.
V5 - 12BZ7 0r 12AX7
looking at Eurotubes they have the high gain/low output set.
it is similar, but still very different.
It is suggested that the mix above yields far greater results.
The Idea is to tame V2 and V3 and keep them under control, V1 works on it's own, then it also mixes with V4, so that was the reason for 2 different tubes as you will get a better contrast.
I have order 3 out of the 5 tubes above. V2, V3, V4.
I was also lucky enough to get NOS.
They also strongly recoomend NOS as they are far superior, but bloody hell are they expensive.
So the tubes should arrive Mon/Tue, as soon as they do I will let you all know.
Hope this helps,
Gezza.