Seems when I return to the site I have to re-input my config... At least on the desktop calculator, I have yet to try the others.
It'd be nice if you could perhaps use ajax to save this in a cookie for me so I don't have to keep re-inputting it.
Or even better let me save my defaults in a profile, that gives users another reason to register/subscribe.
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You seem pretty clued up on your coding skills (at least the site gives that impression), but if you need any help implementing this or anything else I'd be happy to provide advice. I'm a professional php programmer by trade.