I'm thinking maybe a strip of velcro inside the back cover, perpendicular to the spine of the Oberon, to keep the bottom edge of a MEdge light inside an Oberon cover. This would replace the bottom edge of the sewn slot in the MEdge covers. That might work. I may try it on my Oberon, can't hurt. If it doesn't work, I can always yank (terribly gently of course!!!) it off... I would like to have my MEdge light work with my Oberon, but didn't think of how to try it until now.