Lyman V5 profile die experiment

This is something I am working on with Filips help to try to improve filament diameter swing on my V5, this is still very much an experiment, I am posting it here in hopes that other might test it out too and give some feed back.
I thank Filip for rewriting the firmware so his sensor ( http://www.thingiverse.com/thing:454584 ) controls the extruder RPM rather than the feed rollers for this experiment.
I am also uploading a video to youtube and will include a link once it is uploaded. The D