I'm sure his is fine, but I have no idea what mask mine is, and I'm just the guy to go shopping for crystals to "give it a shot!"
Just check the top right corner of the processor, the mask/revision info should be there. I've no idea what the limit of other masks are though, only that the E41J is ideal for overclocking.
When I had my first 040, overclocking seemed an intriguing idea and I experimented to see how far I could push it (not far, as it happened). Since then I've never bothered overclocking anything. I just want stuff to work and to have a long, productive life
