Absolute black, manufacturers of oval chainrings and a variety of other bits and pieces, has released a chainguide which works on oval chainrings, in conjunction with 77 designs.
You can get it in loads of fitting options, Â it works with oval rings between 26 and 34T, on all 1×10, 1×11 and 1×12 options, and (gasp) it even works on round chainrings between 26 and 36T.
It runs a split cage, so you can tool-lessly get access to the chain, and it’s designed to keep the chain secure “at any point on the crank’s rotation”.
For more information see AbsoluteBLACK’s website.
Looks like a straight copy of the one-up components design