Ultimate Breadboard2 Parts Alpha

A few years back I made this baby: http://www.amateurengineer.com/?p=400. While it was nice to wokl with it was very unflexible so I decided to dismantle the old parts and remakre its elements as stackable modules. So here you go.
To see if you like I recomed printing a base_bottom with a length of 1 and one base_top.stl - its a prepared top to hold 10 banana-sockets for interconnect stuff.
If you have any idaeas for new modules pls comment!
Modules
Arduino:
Parts needed

• 2 distance bolts
• 4 fitting screws
• Arduino
  Use: Just to have a fixed Arduino
  DUAL_DVM
• 2 of those cheap, chinese made mini DVMs (ebay, 3€ a piece)
• 4 2mm screws to fit to bottom
• 6 pegnails to fit to cables
• some length of shrinkwrap
  Use:Have two simple DVMs at hand
  CCCP_AVM
• 1 beautiful CCCP Analog Voltmeter
• 2 banana sockets
• some wire
  Use: Thought more of as an example on how to do it since this VMs are made of unobtainium :(
  HD44780
• 1 HD44780 display which measures 36 by 80 mm
• 4 distance bolts
• 8 fitting screws
  Use: often used standard Display