AV Stumpfl modification consisting of an RS100 io Hybrid 6/17 radio hybrid motor and a Situo 1 io control unit. The item is intended for use with compatible AV Stumpfl frame or system components. It is supplied as a modification component rather than as a projection screen, projection surface, video signal device or standalone video accessory. No video inputs, outputs, connectors, latency specifications or physical dimensions are stated.