Kaput,
I have never put the fluid in my Morch DP-6, as there is no good way to get it out, if you don't care for the sound. It does a very good job without the damping. This combination has been up and running for six years w/o problem with any cartridge. I have used Denons, Benz Gliders, Clearaudios, and Koetsus with this set-up with both heavy and light wands. The Koetsu is so good it is frightening. Have an Audioquest 7000 and a Goldbug Mr. Briar waiting for a trial, but just can't take the Koetsu off. Did replace the tonearm lead with VDH from Aural Thrills.
Jim