Yeah, that's the truth! I really hope as some of us start to grok this whole thing we'll be able to do the writeups that will help others on an easier path. I haven't done this much math stuff since I was developing a GPS tracking system about 4 years ago. Curvature of the earth and all that...ugh. [Brain expanding...pain...pain] ;-) But I believe MojoWorld is worth it...it's really an amazing program! -Rex Preblick Atlanta, GA