The original version of this Article contained the following errors in the legend of Figure 3, where: "The right hand panels are projections of this surface into the ka-kb plane," Now reads: "b-e are projections of this surface into the ka-kb plane," In addition, "The upper two panels involve two anisotropic CDWs, with Q2 = (δ,0,1/2)" Now reads: "The upper two panels involve two anisotropic CDWs, with Q1 = (δ,0,1/2) In addition, "followed by uni-axial CDW reconstruction with Q2 = (δ,0,0)," Now reads: "followed by uni-axial CDW reconstruction with Q = (δ,0,0)," In addition, "The simplest harmonic to break C4 symmetry in the interlayer tunneling is sin2φcoskz". Now reads: "The simplest harmonic to break C4 symmetry in the interlayer tunneling is sin?coskz" In addition, information regarding data availability was omitted from the original version and has now been added to the end of the Acknowledgements section. These errors have now been corrected in the HTML and PDF versions of this Article.. © 2017 The Author(s).