My friends dad has one in his garage rafters (titanium mtb). He said the first one snapped at the seatpost join, prehaps from the flex caused by using V-brakes, so he got another one built but this time with curvey seat stays. I should take a closer look at it next time.

Unfortunately his dad had a garage clean out a few years ago and threw his old bikes away, all thats left thats vintage are many pairs of mavic wheels in the rafters and a fair few spare parts boxes.