Commercial bias against the aftermarket manufacturers.
The latter is irrefutable....they are imposing sanctions against the most reliable products, whilst leaving the statistically least-reliable OEM product untouched.
Dare I ask if $$$$$$$$$ might be changing hands. Calculate what it would be worth to the remaining players if a major competitor was knocked out of the ring. How much were cylinders before a bit of genuine competition came on the scene? Is this what is meant by the current popular term " Government- Business Partnership "
RA