Ozzy,
As an alternative to the spikes between bass module and m/t I highly recommend "Big Fat Black Dots" from Herbie's Audio Lab. I'm using four per speaker on my VR-4jr's with good results, primarily improved imaging and less grunge. http://herbiesaudiolab.home.att.net/bigfat.htm
Steve Herblein (a.k.a. Herbie) is great to deal with. I also use his tube dampers and cd grungebuster (great bang for the buck tweak).