Did not know about the spacer, I read/was told all peripherals would work. My guess is by the time the spacer is ready, I'll already have my new style dock...and any SP4 Pro I order going forward will have the new style Dock. I'm looking at him now figuring out how I can put a few folded over sticky notes, etc., where they need to be to fit properly. Not a huge deal, but worth mentioning. Thanks both of you!