Retro on boss 9

I am going to do a retro on a boss 9 with servos. I need a controler
to drive the servos. What can I use? I plan on using EMC or maybe
mack 1 some where down the line. All I can find is servos to go.
The getko doesn't seem to have feed back. Has any one used servos to
go and what was your expierience. I want to use a driver with some
type of track record I think. This is my first retro so I want to
limit as many variables as possible. HELP!

Thanks Bob