Hi, I am a first time DIY'er, although I have built speakers from kits and such. I have had some trouble figuring basic things such as power handling, sensitivity and crossover design for my proposed speaker project from the DIY books I have already purchased. Is there any software package that can calculate these things effectively other than something like LEAP, which costs over $400? Also, do I have to import actual driver data to all software or is there a place where I can download or load driver data. Thanks.