I'm eagerly awaiting the results as well. The people I know who use other JB Weld products swear by them. It sounds like the JB Weld Liquid Hardener should do a good job of penetrating. I'll be interested to hear if it fills gaps and cracks well.
There's no doubt that Cactus Juice penetrates really well under vacuum. Once saturated, the wood is baked to cure the Cactus Juice. Every void is filled and solid. It's not difficult, but it would be nice to have an alternative to the vacuum and the baking.
OK, we're waiting for you; don't let us down! :)