Intrigued,
One more thing about George's JBP... he usually does the chop at the second branch. That's not an issue, but what I've noticed, after watching his ebay listings over the past couple of years, is that none of his trees ever have any taper between the ground and the first branch. There's often little taper between the ground and the second branch! So, to really get the most out of his trees, you really do have to (or "should") plant them in a grow box and let them mature a little more.
When I first got mine, I was thinking, "WoW! A little wire, a year or so of de-candling, and ta-da! Instant JBP bonsai!" Er.... it ain't so. Yes, they're better than a lot of others I've seen, but they still need grow time. And that's the thing that's frustrating about pines: They need time. They're not necessarily "hard", it's just that they need time.
So, I suggest you get some of George's trees. Good material to work with and learn on. If you kill it, you haven't killed anything you can't replace. But, you'll learn what works and what doesn't. You'll gain experience. Then, if the opportunity comes along, you may feel confident to buy time. That is, a tree another has started. Yes, you'll pay dearly. But you'll know what you're doing, and you can keep, maintain, and improve a more "finished" tree. That JBP that is the subject of Brian's very nice long term development post, was purchased from Brussel's. I bet it was pretty expensive.