what size tripod do you use with your MFDB system?
I think the size doesn't matter... the rigidity of the entire system is more important.
So...
1. a stable tripod - preferably without center column if you don't need one
2. appropriate camera plate (Kirk, RRS, Novoflex and the like)
3. appropriate tripod head
As to the tripod: less segments/extensions are basically better.
I am a big fan of wood tripods as they absorb even heavy vibration extremely fast (even when they are fully extended).
I have 2 wood tripods (a large one with single extension, i.e. 2 segments, and a medium sized with double extension, i.e. 3 segments).
I also have a large Induro Carbon tripod (new series) which is very good but I definitely prefer my wood tripods.
Wood tripods are far less heavy and large as you might think first... so maybe give it a try. They are also far less expensive.
Tripod head: I use a Gitzo GH3780QR for my Contax (mostly)... I also use leveling bases with a pano base attached on them (occasionally).