Cloning Systems

I will cut right to the chase. I am trying to design a cloning system that is as low profile as possible, more specifically the space is 4 ft. wide and 2 ft. high. It needs to use rockwool for easy transplanting, it also needs to be able to sustain plants up to 6 in. tall. I have been racking my brain so any input is greatly appreciated.

i use rapid roter plugs , 1 plastic ziplock cup , 1 18 inch humiditiy doam and tray, heat pad & 1 20 wat floresants. works grate with clones.

Cool, thanks for the input. I was thinking of a self watering system, but I think with the space constraints a tray plus spraying them down will work best.