A fifteen thousandths of an inch protrusion of the frame, rests within the well, undisturbed. Once assembled into the wells of the overlay frame, disassembly is difficult. In place, keyclips are quite rigid. Movement is restricted to one eighth of an inch in one direction on one axis under governance of the relatively weak, but effective, spring. When the keyclip moves forward, inclined surfaces on the keyclip and protrusion meet forcing a flexible piec of the underside of the frame to flex the few thousandths of an inch needed to activate a keystroke.
Braille ought to be explored top to bottom, left to right, the antithesis of activation direction.
The computer waits with all the patience a multi-handicapped blind user might require, leaves unmolested any contemplation the learner might desire, yet is easily summoned in its correct time. It was designed for disabilities other than visual impairment, and at present is not well suited to this purpose. Yet, with the proper interface, much of this wealth can come within reach of that population. The interface is lacking. The keys may be grouped as needed and assigned function as desired.