Each to their own, but one primary o-ring leak years ago cured me of trying
to do it by taking shortcuts. We also replace both seals for these. Not to
mention cleaning with denatured alcohol to disinfect against future algae
growth.


Bill Jr



"BWL" wrote in message
...
I've been doing these for years leaving the tubes in the set; a turkey
baster
with a short tubing extension (4"-6") will slip into the hole where the
expansion chamber is attached. suck out as much fluid as possible, remove
outer
and inner lenses, clean everthing up inside the chamber, reassemble and
refill
chambers . I put a small piece of paper towel under the chamber opening
while
draining and refilling to catch leaks. Fill until fluid just starts to run
out
of hole, reinstall the overflow/expansion chamber, reassemble the screen ,
and
usually only need very minor recentering to converge. I do the whole thing
in
about 90 mins, including time spent explaining to the kids.