[ALIBI]

Our thoughts exactly. We DID THE MATH, we started with an 18fps drivetrain that could knock a trackball off in either direction. Forward is on the fly, to the reverse takes a change in direction and about two seconds. We had this done in about three weeks. We spent the next three weeks adding a few other very valuable manipulators.

EDIT: We can also remove a trackball if it is placed between the normal positions.