About 2 years after buying all new cassette style shades for several windows in our house, we unexpectedly had to replace 5 windows. We thought we were going to have to pay another huge price for replacement shades to fit the new width. We were referred to Rowan, and he was able to re-size the width of our existing shades at a fraction of the cost of full replacements. We gave him the measurements of the new window openings and he got them all bang on, at a very reasonable price. It was a big relief not to have to waste the new shades.