I have Sunco AcuraTrak three point hitch controlled by Trimble.  I run it on a 16 row planter and cultivator in a ridge-till enviroment and it works very well IF I have enough coulter engagement to allow the implement to grab and steer.  In some situations (dry/powdery ridge or shallow planting it wants to wander a little bit.  The solution is to run a few coulters between the rows.