We bought the Chimella at the Ideal Home Show but unfortunately had trouble fitting it. We thought it was because our chimney had been modified, so contacted Simon who immediately offered to come over and see what the problem was. However, it appeared that we were trying to fit the Chimella at an angle when we should have held it straight up the chimney. It went up in a few seconds when Simon did it, and I tried to do it myself and it was a perfect fit. Seems to be a great product and fantastic customer service. Thank you.