Doug,
I agree and that is the reason for my question.I keep having troubled with air bubbles and such.I have seen one that came in a Spanish made survival knife.It is over 20 years old and still no problems.My brother owns this and I can attest that it is carried almost daily.I wish I could find one just like it(compass and knife both).The knife is called a Brewer survival knife.An Amazon explorer named Marto Brewer designed it.This is all I know on it.Maybe I should have started a new thread but any info would be appreciated.TIA
BOATMAN