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> But I have two minor problems.
> 
> 1) I need to carry an A clamp adaptor when hiring cylinders. In my 
> experiance, it is virtually impossible to remove the screw out adaptor 
> from hired cylinders with combined DIN/A clamp pillar valves.  
> 
Never had any problems to screw out an adaptor, but I carry a matching
_metric_ allen-key (which allows me to use the appropriate force) in my
toolkit.

> 2) Sometimes the DIN fitting can be difficult to remove. Why don't all 
> manufacturers fit a large, ribbed rubber collar to the DIN fitting. This 
> would allow you to get a firm grip and exert some leverage. Oceanic are 
> the worst offender. The knurling seems to be more cosmetic than usefull. 
> Posidon are better.
> 
Uups, then you are doing something wrong! There is no need to screw the
DIN fitting in with force. It seals when pressure is applied. Use only
two fingers to screw the DIN fitting in and you'll find that it fits tight
and you can remove it (after getting rid of the pressure :) with two
fingers again...

> I allways carry a spare fin strap. When stuck, I wrap it around the DIN 
> fitting to give me more grip. 
> 
This should never be necessary

Regards

Peter Immerz [Germany, VIT]

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