Hehe, wow, thanks for the positive comments. I'll do my best to answer some of your questions.
This was my first whip ever, I cut and tapered all strands from a side of cow leather, no fancy math degree required

. I just took my time and took notes along the way to help figure things out.
I had no existing whip to reference, although it sure woulda made things easier if I did. I haven't done any apprentice work either, I simply used 2 books ... "How to Make Whips" by Ron Edwards and "Braiding Fine Leather: Techniques of the Australian Whipmakers" by David Morgan. Bernie W's web site and Dittmer's site helped tremendously, thanks mates! Also helpful were bits of advice given to me by Molorom, winrichwhips, MajorMike, jerryrwm, Paul_Stenhouse, Robert Duke ... I hope I didn't forget anyone.
The whip, being my first, isn't without its quirks. Little things are goofy here and there, but those goofs were necessary because they taught me what not to do on my next whip.

I look forward to errors, you can learn a lot from them.
As much as I appreciate the compliments, I have no plans for becoming a whip vendor. Although if I produce a good whip or two along the way I might offer one for sale every now and then.
How long did this take? I'll have to peek at my notes and try to figure that out. I just worked on it when I could, sometimes I'd go for 8 hours, sometimes 2, other times only 30 minutes. After the longer sessions, my finger joints would just ache beyond belief ... but it was good pain, and made me feel like I had accomplished something.
Was it hard? Well, that's a subjective term. Was it hard work? Yep, I'd say so, but in a good way. It was mostly fun mixed with frustration.
Oh, the bellies ... first belly was a 4 plait, second was an 8 plait I believe. Both were covered with leather bolsters held with bonded nylon thread and waxed thread.
Whew, sorry for rambling on and on.

And thanks again for the comments, that means a lot to me.