Tambour Door

I am working on a kitchen cabinet with a tambour door appliance garage that measures 30"W x 18"H. I am looking at your 
tambour door router bit set and have a couple of questions:
-- How tight of a radius can this door withstand when it rolls up?
-- How is the door set into a rail? Would any rail and dowel kit work? Or, is the unit designed to just roll up in a wooden track? - 

-Mike
Salem, OR