by jpj » Fri Jul 20, 2007 6:17 am
not if you've got some woodworking skills, you can construct an approximation quite cheaply.
i have a rectangular board with thick dowel rods fixed in each corner, i have another board with holes in each corner which slides down the dowels. for weight/pressure i have a series of catering size tins of tomatoes and a 25 litre drum filled with water.
i had to buy the dowel and some varnish, it cost a few quid to make