The biggest I'm working at the moment is 30x40. I don't know if I want to build a bigger drum or not,
just to please the bigger is better decor fad at the moment. But a drum system is easier to maintain
than a roller-transport processor with all its finicky pumps and circuits. But per washing: my drums
have shallow ribs which allow some water behind, so final rinsing is done in-drum. Then the print
goes into a giant tray with automatic siphon etc for the final wash period. With RC prints, it can all
be done in drum with repeat water cycles.