I would have let the pex go another three feet and cut off the insulation? Joint free. At least that's what I did.
i see u got alot of that wood split. i did too at first. you'll get lazy like me and figure out that you'll only split what u can't lift or won't fit in the door.
Looks like you got it done, here is a link to the post with pictures.
http://www.arboristsite.com/showthread.php?t=77553