So I just got an email for a seminar:

Depreciation Basics and Form 3115 - How to Report a Correction in Depreciation

The basics of depreciation of assets and Form 3115 how to correct depreciation errors, from not depreciating the assets correctly over the correct life or correcting basis of assets. We will also cover the time frame in which to submit the correction in order for it to be processed properly to IRS.

So I guess you CAN use 3115 to correct basis!