Originally Posted by
cyccommute
Old bottom bracket mount racks didn't have a height adjustment. At least that's an improvement. But looking at the way you have to clamp the rear wheel in to work on the fork looks like a royal pain. Considering that the price is about the same as a PCS-4 and that you have to disassemble a bike rather than just clamp it with one hand, I don't see that it's better.
Personally I would rather remove a wheel than risk damaging my seatpost or taking the time to switch to a junk seatpost.