Is it a common problem with Dolan bikes? Or just the TC in particular?
This guy I know had a Leader 725 with a very similar seatpost camping arrangement, which also failed. It's not just the TC, this design is flawed. The Pre Cursa doesn't have it.
Also, this might be a question for another thread, but how different is the ride on Alu compared to Steel? Am I going to hate it if I use it as a commuter/beater on weekdays (3-4 miles), and track on weekends?
Imo the difference frame material makes is overrated. The ride of my Leader 721 is closer to my 531 steel conversion then to my Giant TCR Track. Geometry and tube profiles and stuff are much more important than frame material. Avoid alu aero forks though.