IE 7/8 Support

I'm using Aurora for the first time, and am really liking Singularity, however, I can't seem to my grids to work in IE 7 or 8 no matter what I do. IE 9+ works fine. Configurations so far:

• Using Modernizr and manually included lasted version of HTML5SHIV (3.6.2)
• Legacy support set to true for both 7 and 8
• Tried with CSS aggregation on and off
• Installed "singularitygs/box-sizing"

Can someone confirm they've got their singularity grids working in IE 7 and 8? I really don't wanna have to go back to Zengrids at this point...