Bolted the six T-712 brackets in place on the spar and drilled all to #12--then after deburring, drilled all holes for platenuts and riveted platenuts in place. After bolting the attach brackets in place, I put the tank baffle on the brackets and clecoed in position. The most inboard bracket is attached in a different manner than the rest, and unfortunately, I had it slightly out of position when drilling, so the holes didn't line up to my satisfaction...hello Van's...$1.60 later (and a couple of days for shipping), and I'll be back in business. Not a very exciting day, but a couple of hours of productive work.