I just did mine, and used 173 studs. it is an odd numbered row track. I run 4 2 4 2, but you will end up with a 4 4 next to each other. you could run 3 in every row and be fine. I only run them up the middle. I got 1.4 extreme max studs and backers with 1/2 inch tall nuts. Its a lot of drillling and tightening, but I won't run with out them. Maxdlx