No Wobble Groovemount for MK4 Plastruder

I've been using a Makergear hotend (http://www.makergear.com/products/groovemounts) with my old-fashioned MK4 plastruder. The hotend was the only thing that let my MK4 plastruder become a no-fail plastruder. However, there are always things to improve with a Makerbot. One of these things is what I call "Nozzle Wobble". Nozzle Wobble is when the end of a nozzle has the ability to move some fraction of a millimeter because it is not well anchored to the plastruder. On the MK4, which had two s