We took one of the german slip ons apart. I'm really thinking of just having some plastic caps made that screw on and using them lagering tanks. I figure I can add some generic threaded fittings pretty easily and then transfer in and out of them under CO2. The idea would be to transfer from the fermenter, carbonate and store in these 1/4 barrels and then transfer to another sanitized keg for serving/bottling. Hopefully then I can have clean beer with no sediment that I can transport. I hate when I move a keg, even slightly some times, and then I have to wait and waste beer while it re-settles.