The amp sounds amazing with the 6V6's, you're exactly right. I actually like the sound of the 6V6's and WZ34 together too. The 6L6's are JJ 6L6GC. And yes, there isn't much grid drive. And they sound a bit shrill. Just for reference, I'm using the classic tone 40-18002 20W output tranny. And I just realized the primaries are 6.6k ohm vs. the normal 8k ohm primaries on most 5E3's transformers.