I kept insisting with the dealer that the rotor cones were no different from what I could see, but I was continually told it was different. So I purchased a new rotor cone, but it is no different, all I can see is it has more vane mounting holes. First time I have heard this "shallow" thing. What it does is suck down the vanes against the cone because there are now more bolts to hold them down. Before with less holes, some of the vanes were not touching the cone between the longer distance between existing holes. All CASEIHC has done is "improve" quality of vanes sitting against the rotor cone because of more bolts. The extra holes now means a new part number for the cone, and now they can say you need to replace the cone, and this brings in extra sales to meet their sales projections. Just another one of the OEM ploys to empty the farmers pocketsIJ CASEIHC dealers are not informed enough to know what is different - they see a new part number, their sales rep for their region says, yep, you have to have this new cone, and the information as to what the change is has likely been kept from him alsoIJ Keep everyone in the dark - this way the dealers believe what they "think", not what the change really is, because no one knows or will tell themIJ