Maybe I should add that this 'stand' is very much like a copy-stand lying on its back without a baseboard, except that the tripod mount is on the bottom which would be the backside of a copy stand. Look about for copy stands and you might find some very usefull hardware. I got two Polaroid M style copy cameras from a local printer just as they were going into the dumpster. They have huge rails, but you can't beat the price.