I carried Dahons HAT060/HT061, made for the Chinese market, in that case. The corresponding US model is the Boardwalk I think. They fit except for one wheel and quite a bit of dismantling is required. The Brompton M6R has not been much of a problem, put in/take out, with just minimal wiggling.

The Dahons have damaged the foam a bit and I turned to a glue for foam. Also I had some problems keeping the padding strip, that goes over the case's hinge, in place. In total, that case has been used so far in 4 trips, including to Asia and to Europe.