I'll soon be starting my journey into the world of DIY. Thanks to the members here, I have everything ordered and should receive my packages by early next week. The only thing that I need is a DIY calculator. I'm running on a Mac and all I have been able to find are programs for PCs. I've run across an excel spreadsheet I would prefer a stand-alone program. I have downloaded the ejuice calculator for the iPhone, but it would be nice to have a program for my laptop that is more comprehensive than the iPhone app. Can someone please point me in the right direction?