hmmm could be an interesting drive [sm=spinnyeyes.gif] I usually find the sizes I need or see as being possibly useful in the scrap bins at a sheetmetal fabricators. Just ask the managementif you could rat around the ofcut bins, usually not a problem. and often they will have end caps too which will be cheaper than at any store. You may come up with a different idea to cap the ends, which you will need to do, or the ends will fold over and start to collapse, dont ask how I know [sm=rolleyes.gif] I just did a count, I have 23 different sizes at the moment.