Confirmed. A cease and desist letter carries the the legal weight of slapping you in the face with a mitten. It's just a formal whining: "Hey, hey now, I don't like that! Stop!" It hasn't been reviewed by a magistrate of any kind. It is intended to scare people. Even if Tunze doesn't send a vendor a cease & desist letter, they can still sue such vendor just as well as any other.
Anyhow, I got my WP40 in the mail today (woot!) from a group buy. All the discussion of variable power supplies and maybe not getting one had me worried. I'm a simple man and don't understand teh teknology. Fortunately, the wp40 came with a slick controller. Picture is attached. All I will probably ever use is "Else" mode, the speed-dialer (knob on left) and "feed mode," but for those who want to put fiddler crabs on surfboards and create a standing wave in their tank, I think the other buttons do stuff like that.
The dial is easy and does not feel flimsy or anything. I've had the pump running for a few hours next to my MP40 and like them both. The MP40 has a lower profile, which I appreciate, so I placed the wp40 in the back left corner and the MP40 in the front half of the left-side panel. Both blasting the same direction and creating a gyre throughout the tank. (Although both are dialed down to ~40%). My Dart/OM closed loop hits the corners and I don't think there's any low-flow zone in the tank now. :dance:
SWIM FISHY, SWIM!
EDIT/Question: Did I miss something? Does the speed-control knob stop working or something? Why are people discussing variable power supplies?