Jack,
I have to agree with Don. I've never heard of the arm coming loose or out of adjustment like that. I too think your guy may have justg missed getting it tight enough. Very easy to do, as they are a pain in the arse to tighten with the tubular stuff.
AND, whatcha mean, "perhaps" you will see us at the DVII?! Man, that is a madatory--"show up!"
June 21,22,23, 2002.
DV