You aren't looking at .1mm, you'd never notice .1mm, the offset is in inches, .1 inches you will notice. You're looking at a swing change.

Different loft, you're looking at learning new distances.

Very nice!  Don't let me bias you one way or another.  Let the pro fitter work his magic and hopefully you'll develop a long term golf business relationship with him. 

 thanks for the 1888- titleist tip...they were able to help and i have a fitting at a nearby golf store that is an advanced fitting studio- thank you.

Since it is a brand new cover, please take it to any Titleist pro shop or retailer and have them call the Warranty department at 1-800-833-3450 x 1 and they will take care of it for you.

Yep, sure does throw out spine alignment.

Never understood spine alignment of 1 club.