Bike noise, creak, click, creaks, clicks, clicking, pinging sound - help

yeah, but what? I can't see any cracks, externally or internally with a torch, can't see any excessive flex even when i get someone else to make it make the noise...

re. clicking my selection of san marco saddles all have a bit of clicking which I have diagnosed as the shell moving around on the rails. Regale saddles you can actually physically move the shell around a little bit whilst its clamped in place.

I'd second this, I have pretty much the exact same creaking noise problem, and without having changed my selle italia turbo to check, after going through almost everything else, i'm sure it's the shell moving on the rails as doubletap has said

Change your saddle and see