TUBES 6922 pinched waist

The 6922 PQ's that Tvad references are top-flight, IMHO

Tvad,I have been to that site and thats what turn me on to the pinched waist tube.He says the pinched waist is Yeow! My reference tube.He goes on to say the shape of the tube helps reduce microphonics,quite the contrary to some of the post.Are the chances of a pinched waist tube being microphonic any greater then a 6922 PQ?

Do you know of a reputable tube seller that will sell pinched waist tubes to anybody.Some do not sell to you unless you buy their gear.