Just converted my Spesh Enduro to 1×10 on Wednesday.
i used an old hollowtech II XT triple chainset removing the rings and replacing them with a Blackspire 30T,not sure if all narrow wide chain rings have threaded bolt holes but it was a straight swop over for the existing chain ring bolts.
XT 11-36 cassette
XT shadow plus medium cage rear derailleur
XT 10spd shifter
Seems to work fine messing around out the front of the house,wont get to test it out properly until Saturday. :)