well masseydane, i don't think a post crop of mustard would work here. either it's too dry after harvest for a small seed crop to emerge, or it's too short a time before we get frost. Plus the thought of losing moisture for next years crop scares me.Anyways, we have an update!! We did about 20 ac with the rig, and noticed that the bottom of those "shoes" were wearing off already. So we took the old blades, cut the wings off until we had about 6-8" shovels. We tried the update yesterday, and it makes a big difference. You can notice the soil shattering and lifitng about 6-8" on each side of the shank. It also pulls much harder ( stopped the 4620 cold in one spot of alkali). We aren't going to double up anymore this year for experimenting, just to see what happens next year. We plan on only doing about 50 ac on 5 quarters, most of it being low spots where the water just seems to sit FOREVER! You really can notice where the hardpan is, once you get out of it, it pulls easy and the soil just flows around the shanks. It doesn't disturb the soil as much as cnotills video. That's all i can think of for now. More updates to come, I hope!