.<SNIP>
> Hadn't you heard of 'J'-valves?
>
> >Yeah, it was dumb even by the standards of that
> > day,
>
Yeah, BTDT have the t-shirt probably wore it out. Reliance on a J-valve
is/was a really good way to become a statistic. I learned in the late 60's
and we still didnt have SPGs (or wetsuits in lake Michigan either.)
CH
.