Built To Spill’s tightly knight brand of shimmering guitar pop was let loose Friday at Mr…. Built To Spill’s tightly knight brand of shimmering guitar pop was let loose Friday at Mr. Small’s, as lead singer Doug Martsch (right) played adventurous versions of the band’s songs — many of which meandered past the 12-minute mark — to a sold-out crowd. For more info on the band, visit www.builttospill.com.