Which Thiersch M7 idid you test? I have a Thiersch red in my Wunder. I believe that is what he is using. I also have a beesneez K7 in a CV4. I have to say that I like the Beesneez a lot. It is very smooth. Knowing that a PVC capsule will break down at some point kind of puts me off them. From my tests, moving a singer an inch makes more difference than the capsule used in the mic. (if the casules are of the same type and quality). I'd love to have endless amounts of money to try various capsules, but alas, I have a family to support too. :-)