I have the Guilbeau,

The mother tree died last winter, but luckily I was able to pull a sucker off it last Fall, it had not grown like the mother tree had so just while ago I pulled it out of the pot...Yep it had the dreaded RKN...Then I decided to give it my version of what James had posted (maybe Jose too) by putting the root-ball in hot water, I mean HOT for 15 minutes, then I cut all the roots way down and re-potted it 6" deeper than it was before, then I cut all (5) leafs in half.

If that poor little thing makes it I will update ya'll later.

I might add if it does make it I will do a air-layer off it just to be on the safe side