Hi Bruno,
did you read this?
http://www.esa-systems.com/esa-syste...structions.pdf
much luck with your o-rings
Walter


"Bruno" schrieb im Newsbeitrag
...
The major USA gliding retailers all troll this group...Bumper has some
really cool stuff (and is a super nice guy) and if he is now too busy
to keep handling the one-off sales, maybe one of you need to carry his
couple of products more as a public service than as a huge money
maker. I would be happy to purchase both of his most current products
for 50% more from one of you if I could get them from you. Yes, you
won't make a lot of money but you now have a gliding customer on the
phone and all of you are great at the upsell. I love my yaw string
and vent silencer from bumper. So gliding retailers which of you can
help us out?

Bruno - B4 (now 12 hours into trying to get the o-ring back into the
back of the pitot tube...)