DMT Extra Coarse plus a few Shapton glass stones in the photo.
Sistema Box 14.75 Cup http://a.co/e0Bj4ay
3M 3/8" cylindrical bumpers http://a.co/9JYAET1
Be sure to drill holes in the box so your stones dry out. Also, put bumpers on the box under the DMT plate so it's not sitting in water. Shave a couple bumpers thinner if you want them near the ends, or just put one in the middle and let the bottom sag..