Hey Guys - literally the day after I really struggled in restringing the new X30, Davy sent me a ~30 second clip showing their recommended way (I had written to him complaining that I was having trouble) - the video is at the 9:45 mark:
https://www.youtube.com/watch?v=1M850P0_kVs
I was unable to keep sufficient tension on the string without it popping out as I was trimming and threading the string. I used the golf tee/bridge pin trick that Earl and others have described here. I also had a hard time getting the ball end to latch into place like they showed here - I had to insert the string, put my other hand inside the soundhole and guide the string into the groove where it locks in, and while pulling really firmly, inserting the temporary bridge pins - while doing all of this, it would work 2/3 of the time, but sometimes when I would add tension and remove the bridge pin, the string would come out. Hopefully next time I will have less trouble.