Anybody clean their c550 from the bottom-up? Someone on another post said there is a pin the runs across the flue which prevents this type of cleaning method in its little brother, the c450. I haven't had a chance to remove the tubes and plates yet to take a look for myself. Last year was my first season burning and this will be the first cleaning. I'd rather do it from inside the house than on a ladder at the top of the chimney.