A modular rack system for the Raspberry Pi.
I made it so the audio/composite ports basically hold the Pi in place.
(If making a cluster, I'd think audio and even video wouldn't be needed. I'm ssh'ing into the Pis)
The top support is for 5 Pis (easy enough to change/redesign fro the # you need)
As a footnote, the Pis are a little crooked; I didn't feel like fixing it, needed the system up and running.
There seems to be a slight difference between the Element 14 and the RS versions on the audio connector. The Element 14 seems to a little shorter and spaced a little further apart, both by abut .5mm
Dovetails might need a little filing for a good fit.