Anyone use BHTs in their Mark III? All of my Mark IIIs have been sensitive to 34 selection - more so than 6L6. Ive been happy with Tung Sol 34Bs for a few years. Thinking about trying something else. I love the BHTs in my rectos. But I am currently recto-less and have no BHTs to try out in my mark III. Just looking for some opinions before I order.