Am I missing something? A butt hinge does c.
Err true, I guess I was more tired than I thought when posting that. C is the least preferable aesthetically, but probably the easiest mechanically, so I should probably just go with that.
Flap hinges are a thing, maybe that's more what you are looking for.
A flush butt hinge would do B. Might want to look at some flavour of cranked hinge if you don't want to fix to the edge of MDF.
@Polygon started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
Am I missing something? A butt hinge does c.