Jeff, drink the kool-aid.....ummmmm kool aid. You know John will pester you until there is at least 10 pounds of plasticlay stuck in, on or around the base of your TT. Don't put it on the outside (like someone else we know)! 
Hey, I res
emble that remark

Unless there were variations of the Technics tri-ply layering over the past 30 years, there is
no room for plast-i-clay in there (believe me, I tried

)
That's what part of the deck that makes it so decent bone stock.....it already has very good feedback rejection due to it's tri-ply layering (and makes in quite sturdy for rough handling and shipping, too)
At this point I should mention that I've gone back between my
JVC QL-F6 ($100 on ebay, 8 lbs of plasticlay, internally damped tonearm in horizontal and vertical directions, Isodamp sub-mat and Herbie's top mat) and the
Technics SL-1200 ($125 on ebay with smashed tonearm, $3000 Origin Live Illustrious Mk. III tonearm, outboard motor supply/strobe disabler). Both are sitting on 4 brass toes pointed headlong down into a 3.5" thick maple block.
Guess what - no difference to me in terms of enjoyment. I might even give the slight edge to the JVC for naturalness

So, I've reached this conclusion at this moment in my vinyl journey:
1. My ancillary equipment and or room treatment needs help
2. The JVC is a particularly a great deck and the Technics needs some help somewhere (might want to look at another modder's take on how to improve the SL-1200...particularly the attention paid to eliminating the stock Technics regulator...which KAB's outboard mod does not do -
http://www.soundhifi.com/sl1200/index.htm)
3. My ears are trash and/or I am a complete idiot (hey, one has to investigate all angles

)
John