If your changes include the fittings within your lofts, be it perches, boxes, feeders, grit stations, baskets, louvres, food savers, ets traps ect. Please feel free to get in touch. I can make most things, and they have been very well commented on, and are very good prices. I use the best of materials, which make them the best on the market. Good luck with all your alterations. alex "crafty fifer"