We were turned on to this via a Facebook post by SonicState from IKEAHackers where somebody has got inventive with a toilet roll holder, namely the IKEA ENUDDEN toilet roll holder.
The user called stoolzo (no pun intended?) made a Made a 9U powered modular Synth case, tells us how he created the rails and where he got the screws from.
So if you're flush out of ideas for where to buy or how to build a case for your synth modules this might inspire you. If you do take the plunge, let us know!
Learn synthesis in the AskAudio Academy here.