Sim, your work would be all the more valuable if your invitation were extended to US and JAP variants. PAL users especially go to the US or Jap versions for early releases or cheaper copies and need to know whether or not an original should be copied.

Similarly there is a large UK community who have Jap or US PS2 ....

And finally, your audience is worldwide and waiting with baited breath for your 50th!

Cheers