To damp or not to damp JMW-9 Sig ?

Parelius, I just looked at the arm and I see the hole you are talking about, but I cannot see a screw inside. Now this may be due to poor eyesight, but I tried the two hex keys which came with the table and neither fit anything inside the hole. What type of tool is used to turn the screw?

OK, I tried dampening the arm last night and didn't like what I heard. The sparkle left the music. I read that Harry said if the cartridge was damped then not to damp the arm. The Dyna 20XL is damped.
Would've got back on this sooner but have been out of town. Thanks for the response Stringreen

FTR, I thought about trying less fluid. I thought it may have been over filled. But there was no fluid on the underside of the JMW-9 arm when I took it off of the pivot. That made me believe that there was not too much fluid. The trough was about 1/2 full. I may try it again. I've got lots of experimenting going on right now. So far I've tried 4" maple platform with the Super Feet and a sandbox without the Super Feet. I'll post some results when I have something more definitive

Thanks for the recommendation Stringreen. I've heard good things about the Gingko. Many also recommend the sandbox. However I have found that the benefits of the SB are highly dependant upon the platform material that is used atop the sand. I tried MDF and that was too much damping. I found that Travertine tile was a good material to use. It livened things up and gave better definition throughout the spectrum. It worked well with the ScoutMaster with standard arm. I started to play with Maple as well, thus my 4" platform. It didn't work as well as the SB but that was while using the std arm. My next project will be to try maple atop the sand of the sandbox, which I have heard is the best of both worlds. I am a woodworker so I have the ability and tools to do the projects.
I should note that my sandbox is a 2 piece unit with a separate box for the motor. I have talked to Harry at VPI who liked the idea very much. FWIW, he suggested that I remove the rubber feet from the motor and replace them with machine screws. He said it would improve the sound, but I can't say that I have heard any difference.

Sberger, I tried just a little fluid and there was some improvement, most notably in the bass. However I'm not sure if there was some trade off with other areas ie the airiness. I must also note that the table is now sitting on the sandbox with Travertine platform atop the sand. It also has the stock feet. Whereas when I tried damping the arm before the TT had the Super Feet installed and was mounted on a 4" maple slab. At that time there was an airiness to the music that was quite nice. The bass was there and deep, but not very well defined. Now I have defined bass but have lost the airiness that it had before. So I'm not making a good comparison as yet. But it does show that good results are available using the damping fluid.

Stringreen, Thanks for the info on the Gingko. I was not aware that it was 2 piece.

Stltrains, I am going to order some isoblocks today. This has been the plan but haven't had time to do so yet. thanks for the info.

I haven't had time to do much listening in the last couple of days, but I do now have the maple top for the sandbox. I'll be experimenting with it over the weekend. Thanks to all for your info and input.