Hah!, I built mine from cls timber (B&Q) cost me about £10, I used to do chippying and have all the tools. However, when I went to put it in I couldn't get it in, I had made it 10mm too wide.....Ok so laugh, I remembered the old rule of measure twice cut once rather rapidly then. I remade it 6' x2' and it then fitted, I blame the new fangled metric system being as I am old now, it looks ok and saved me masses of Dosh. might try to post a pic one day.