I did the upgrade today to an otherwise perfectly stock Rubicon, done in 45 minutes. Mine was build on 6/24/19 and still had short arms. I went from 4 degrees to 6 with the swap, and I must say now it drives perfectly. No more wandering or dead spot in the steering.
I ordered a few days after you did. Yesterday I sent an email asking for confirmation of shipment prior to the 21st and no reply. If nothing sent by the end of the day tomorrow I think I'll get a refund via PayPal.