Jerrari GEN2 Table Top Rail Adapter (Bộ chuyển rail để đưa 2W/3W về 1W)

This uses the “lower tray” that the cover uses to enclose the stack, but adapted so that you can switch back down to smaller widths.  The tray locks in use the Gen2 QL, but then you need to screw the next drawer cage to the adapter to lock it in place.  Similar to how the feet work.

when you use one tray, you'll have to use a matching one on each drawer so that you maintain a level height.
As in my picture, i'm converting a 2W back to dual 1W.  So the 1W, will need the same "adapter" in 1W to level everything out.  Hope that makse sense.