I did see all of the practices and I didnt like what a saw. He was by far the slowest and least agile OL in the practices. His kick back step was borderline horrible, which means I am not sure if he can play OT. Came away thinking he would get abused by pass rushers and he did during the practices. Here comes the "but" though. That was Herman Johnson at at close to 400 pounds, coaches may see a different story at his current 382, and an even different story at 340-355 (where I think coaches would like to get him at considering Grimm said that he is a guy that will never be below 340). I have a feeling they are trying him out at OT becuase he has the first tool that 9 out of 10 great OT's have and that tool is long arms and Johnson had the longest arms out of any OL in the draft at over 36 inches. So I think thats why they are trying him out at that spot first before making the possible switch to OG later.
As for Cody Brown I remember him looking stronger then I though a 245 pound rush end would be, because he actually used a couple of bull rush moves effectively during one on one drills. But he didnt have any inside moves at all. The only two moves he had was the outside dip and under, and the bull rush.