Good luck with the warranty, hogman, I hope it works out all right.
As I said, I've never installed the new yoke, because I never had the drifting issues with the short shaft in the quick hitch (but I'm keeping it, just in case!).
So far so good, anyway. When I read about the problems others were having, I checked the set screws, tightening them up with a bit of Loctite on them, after ensuring the shaft's position was correct.
If you're interested, I ordered the replacement 6" slip yoke (through a tip from another TBN member) from Inland Truck Parts in Overland Park, KS.
Seems like it was around $30 or less, and came with a new u-joint. Their part number is 014 812-0615.
In the pics, you can see the original yoke connected to the quick-hitch subframe, and in another pic, the replacement yoke, for comparison. The new one is about an inch longer in the splines.