330lbs is too strict for a minimum requirement for a LT. Plenty of LTs that are 320lbs or less: Tyron Smith, Joe Staley, Jason Matthews, Terron Armstead, Branden Albert, Eric Fisher, Donald Penn, Eugene Monroe, Joe Thomas, Duane Brown, Anthony Constanzo, Luke Joeckel, Taylor Lewan. There are more, but I listed some bigger names. Many are under 310lbs. I think a good weight for Spriggs will be 315-320lbs. I don't see him putting on almost 30 pounds. He's got LT feet, so he doesn't need to be 330lbs. He might lose some of the athleticism at that weight.