Reply by patron

another thing to be aware of
where the work is
in relation to the clamp thread
will bow your glue-up too

if the work is flat on the pipe
the offset pressure will bow it down to the pipe

if it is over the threads
it will bow it up
away from pipe

as the pads come off of 90 deg. slightly

in panel work for doors
we usually make some ‘sleepers’
that rise the work
so the center of the thread
and the center of the work
are the same

this keeps the work of of the pipes
and makes them easier to move under the work

and just snug them first
and come down from the top
with alternating clamps also
(in center too)
and tighten all together

use a straight edge to check work if it looks bowed
by ‘tweaking ’ alternate clamps
you can make things flat thru-out
and reuse all the sleepers again
(some tape on the tops of them
make it easier to clean of glue)

-- david - only thru kindness can this world be whole . If we don't succeed we run the risk of failure. Dan Quayle