The site is going to be down for a while while I redo it. Unfortunately, I don't have a ton of time to devote to it at the moment, but I do plan on bringing it back in a simpler form. The calculators and a few articles will be back. Thanks to all of the kind emails reporting bugs - it's alwasy nice to hear from people who have found value in what I've built. Stay tuned. I'll get it sorted.