On 12/11/2012 9:22 AM, dadiOH wrote:

with yellow glue. Concrete blocks might work, don't know as I use home made
clamps along each edge which is where you want the pressure, not in the
middle. The clamps are rings about 3/4" wide cut off a 2" PVC pipe and then
split on one side. One doesn't put on much pressure but when thay are
spaced 6" or so apart it is plenty.

I'd heard of that shop tip in the past but had forgotten about it.
Thanks for reminding us all of that cheap, customizable alternative to
Bessey, et alg