Visualist, an instrument for the VJ/ artist

Visualist, an instrument for the VJ/ artist from Berto Aussems on Vimeo.
Searching the internet you can find many audio effect circuits but analog video effect circuits are rare. Why? Is there no interest?
The aim of this project is to make a video instrument for VJ's and other artists and open enough to experiment further. The parts are cheap and easy to find. Some knowledge of electronics is a pre. Special for the d.i.y. artist I made a PDF with building instructions:
s3-eu-west-1.amazonaws.com/​bertoa/​VisualistKl.pdf