I just got my Grizzly G0691 and based on my layout I think I'm going to need a mobile base. My question is... I know there are universal mobile bases and I've seen some specific to the longer 50+" table saws that have an extra extension. What do you guys do? Do you have a mobile base just under the cabinet part? Under the cabinet and extension wing? I'm interested in a purchased one, not a home made model.