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George,
OK! OK! I committed a phrasiological sin against God and nature. I didn't
mean to
imply that regular disks should be used in technical exposures at all but
that these
stupid holes should be plugged up solidly as you suggest. The "no pops" I
use do
plug the whole shooting match up for good. They are about 4 times the
thickness of a 3000 psi rated disk. No bullets in this gun !
MY intention was primarily to point out the opportunity to get defective
equipment
straight off the shelf and the need for "all" divers to inspect this often
neglected item
carefully.
Blown disks are a hazard for recreational divers also but it is not as simple
a matter for them to solidly plug this hole as it is for us ("no pops" are
not easy to get and no shop is going to alter a plug for them), so, insuring
that the standard components are right is a reasonable measure for the
exposures they face and the resources available to the typical diver. Yes,
I know this is a technical forum but we also know that many up and coming
divers read it for various reasons.
You may have noticed in an earlier post on the subject that the edge of this
hole is
much like Goldy Locks' porridge; not to sharp, and not to rounded, but
juuuuust right.
If some diver goes hammering on his plug to insure that there are no ridges
but doesn't have the extra disks to stack under it negating the effects of
the altered edge he will likely make matters worse rather than better. As
you well know, you can not assume that all divers, technical included, have
the mechanical aptitude you do but it is safe to assume that many will act on
that little bit of knowledge that can be dangerous.
How about a short lesson on various acceptable ways to plug these holes for
those with limited resources as well as those with a machine shop. What is
the best metal to use? How do you prevent corrosion of the disk? Torque?
Washer material? Cold solder joints? Help us all out big guy!
I must say that at long last I feel like a real member of the technical
diving community having finally been mildly flamed by George. My pride is
exceeded only by my need for more knit picking controversy in my life. You
are right to knit pick, George, as details matter greatly in this business of
diving and I applaud your efforts to keep us all straight in the interest of
making better safer divers and instructors.
I hope you appreciate our occasional attempts to reciprocate in kind.
Chuck
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