I'm making some small frames that will be doors on the front of a bathroom vanity unit that will have leadlight panels in them, with the frames being milled out of very old oregon roof beams to make sides of only 32x21mm and the top & bottoms 60x21mm.
To make it easy I'm thinking of using my biscuit joiner machine to cut out slots either side and then assembling the joint with PVA glue and a standard 50mm biscuit. Hard to picture I know, but in essence, is using biscuits a crappy way to join frame corners instead of either dowells or mortice&tenon?