CMRC RESPONSE
The CMRC evaluated the followup to our response to the proposed rule change to allow adjustable jib cars to be added to the jib tracks for one-design racing. The proposal was evaluated on the following criteria: performance benefits, cost, safety implications, potential loopholes, and feasibility. The proposal failed to meet the final criteria with regard to the LS-10. If a LS-10 owner were to create a mockup of the adjustable jib leads using jib cars with ball bearings, including where to run the control lines, this proposal could be re-opened for consideration.
RESEARCH AND REASONING
The consensus of the professional riggers consulted during the original response was that to be able to move the lead under load, a jib car with ball bearings would be required. The Schaeffer lead car runs on polyethylene liners and does not have ball bearings.
The official response can be viewed HERE.