Any suggestions on the best way to sync up my Uptown Automation system with Pro Tools HD?

Currently we are running MIDI out of the Uptown PC to a Unitor into PTools. Operation is hit or miss.

One option is the Digi SYNC I/O. I guess another would be a sync box with word clock out. (like aardsync)

Has anyone had luck/failure with either option...or others?

Thanks,
Matt Cusack
Grisly Labs Stidios, JC NJ