Congrats on getting your new mill! my motor and spindle also got warm upon delivery. My motor didn't make it past the break in period for it bit the dust. they shipped a new motor right out though. I now use a treadmill motor like Hoss, but would like to go to a spindle servo or something different. if you plan on CNCing it, I would highly recomment doing the bearing upgrade and go to a different motor. my replacement motor would get so hot you couldn't touch it after cutting a part for 20-30 minutes.
Again congrats on the purchase, it is terribly fun and addictive to mod these mills!