Hold on for a real answer from Julian or someone who knows a little more than I do, but I think the LXR actually swings the midi clock when it's master - like, it sends out a midi clock signal with swing, so all the other devices following the clock should also swing. Maybe because of the way that's implemented it's not capable of swinging if it's slaved... But given that it's open source and firmware improvements have been coming along pretty quickly, it's likely that could be implemented by someone sometime down the road.
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