RE: RDM cam adapters for CR 5.6
It's possible to use the existing SDM cams and additional spacers to fit for RDM, or change to slightly smaller diameter cams (from upper SDM position/s)and use the extra spacers. The fitment result is not so ideal from a practical rating, as the cam/spacers don't stay so well on the batten interface when rigging/derigging (esp in crazy 5.6m hi winds), and (as you know) the cams are slightly bigger which distort but not damage the luff sleeve.
I agree it's not ideal, and FYI I'm now using SDM400 in CR-R2 5.6m.
Cheers ~ Ian