We definitely needed the ear defenders; grinding is noisy work but quite mesmerising too, especially with the sun reflecting off the surfaces of the bells. Six finishing stages later  one of the bells was ready to hang as an installation test. The old barn at the St. Columba Steadings on Iona is no gallery but it is a great space to try out ideas and perfect for this trial of fishing line, which claims to hold a weight of 40 kilos. Only another 11 bells to go…