Ok people, here is what I'm feeling confident enough to call Punnet Mk1 (now I have a Pi for testing it with).
There are 2 downloads:
SVG editable version for modding.
Short list of changes:
>USB hole is a tighter fit.
>RCA video hole is larger, as I noticed the connector on my Pi was at a bit of an angle, and I guess other boards may have the slight irregularity, so this is to take it into account.
>Everything lines up! (at least it does for me!)
Thanks for all the feedback and comments all. I've got a real kick out of seeing the variations and mods that have been done
I'm considering Punnet pretty much done now, as there is the .SVG if you want to mod or tweak it, but I might come back to it some time, I just I won't be doing regular updates as I have been doing. Please do still keep posting ideas/feedback/photos/mods etc though!