Herbie's Hal-O tube dampener's on Calypso?

I ordered four Hal-O's today.
Will report my finding's after this next weekend for anyone interested...

Hi Perfecto man,

I just received four of Herbie's tube dampers a couple weeks ago. This is the first of the four products I have tried that were a step forward. The others gave me little or no improvement and the Mapleshade brass dampers were horrible. You will be happy I think. Overall they just add one more layer of naturalness.

You Calypso folks are quite the helpful friendly bunch.

Last week I ordered up a bunch of these. I will report my findings in the Io and Callisto as I have to believe the improvements (if any) should be similar.

Steve is a great guy.You have nothing to lose with a 90 day return policy.

JD, that's promising info as a buddie of mine just told me he always felt they made the sound more closed in. But, I wanted to try them for myself. Should I just slap on all four, or do either the gain or output stage first? Any recommendation on that? Or positioning the dampner on the tube? Supposedly, even that can make a difference.

Jafox, why you no go with Herbie's?