Drag Lever for Concept 2 Model B Rowing Machine

I've recently brought my old Model B out of semi retirement, added a PM5 monitor and RowPro software and started on a quest to get fit again. I've added additional cowling to bring the drag factor down in line with the later models and designed this attachment to allow easy adjustment of the vent across its full travel from the seat.

Also see my scale for the model B - http://www.thingiverse.com/thing:1449048