Gort...Yes...you nailed it!
I believe o-rings are universally not understood by most and are often mis-used in an attempt to hide the sins of poor craftsmanship.
As a machinist...I learned tons about o-rings and o-ring tolerance.
I'd get this....."Just give me some grooves for o-rings." (A misguided belief on the part of the customer o-rings fix leaks.)
The biggest lesson was this:
"Few customer never have enough time to do it [$]right[/$] but they all have enough time to do it over!"
So the lesson is...take the time and do it right in the first place!
Everybody should "Bookmark" this website:
<a href="http://www.applerubber.com/library/techofail.cfm">O-ring Troubleshooting</a>
This website is full of good stuff about o-rings.
OH! BTW....Register. Inside there are tons of calculations for 0-rings. Very informative website!!!!
If you don't have a Mac...get one!
Get it? Apple......