Am wondering if building anything larger than 5kg (11lbs) just causes more problems than it's worth with top loading H-axis washers. IIRC Miele and others stop at that range, and there seems to be no one in any rush to develop any thing along the uber-sized units simliar to Staber.
There are commercial H-axis washers, but they mainly load from the front, and, IIRC don't offer super high rpm final extraction speeds.