Thanks for posting this. I've been looking at getting one but this has made me pause.
This is an enthusiast producing these and the beam spring mechanism is entirely redone with modern touches (e.g. support for mx style keycaps) so there is risk, but mine works great. I think that the fully enclosed beam spring mechanism should hold up better during shipping than the spring-and-barrel mechanism on the model F.
Of course YMMV and it is an expensive and rare keyboard, but my experience has been good.