Silvan wrote in message ...
Snip
I could never manage to get it closer than that and
keep it there while the bolts were tightened back up.

Hi Silvan,

You seem to have gotten a lot of advice on how to measure the gap but
very little on how to solve the problem of keeping everything aligned
when you tighten the bolts. Things to try:
1) Tighten one bolt at a time and check the alignment after each bolt
is tightened. It may be there are one or two bolts that are pulling
things back out of alignment. If so, tighten the offending bolts last
and just snug them up – don't get them as tight as the rest.
2) How loose were the bolts when you made the adjustment? Try moving
things around while the bolts are just barely loose so that you can
tap everything into place with a wooden mallet. It could be there is
a small gap somewhere that is causing some flexing when the bolts are
tightened. Keeping the iron in tension should help.
3) Sit down, relax for a while, and then call customer service. Maybe
this one should be first. :-)
4) Return it and get a different one. If there is a flaw in the
manufacturing process that is causing the alignment problem, then it
will always be causing you headaches. Getting a placement will let
you know if the problem is in the design or manufacture.

Good Luck,

Weldon