Lovely, works a treat don't it. IIRC Ogre also made a very nice 'formal' style red brick procedural and I'm not sure if he shared it but I recall seeing it in a thread.
re: guitar...I was recently given a Masarati of a guitar that I'm trying to tame ( A Gibson B B King "Lucille" model) and that's leaching considerable computer time so I set up really long renders and let it run while I play. Retired so I've no worries about 'work' interrupting my vices...