After fitting the 4 feet I expected to be able to use it but sadly this was not the case. One of the bolts securing the control valve to the frame was not fully tightened & had been put in at an angle (hence the reason it was not fully tightened) & one of the bolts securing the burner to the frame was loose because the thread was stripped. I tried calling Calor but when I eventually go through after a very long wait I was told to dial again and select option 1. This I did but could still not get through after another unacceptably long wait. I needed to use the burner this weekend so I went to a local hardware store to purchase a new nut, bolt & washer. Unfortunately they did not have any black ones.