I'm thinking about removing the BDR cones as well, and substituting rollerblocks, a product I swear by. I think, instead, I'm going to try a Symposium platform with rollerblocks supporting it.. Possibly they factored in the performance of the cdp with the bdr cones and designed to that spec , although I have no information to support that.
By the way, I got a nice little performance boost by moving the rollerblocks that were under my old cdp to my ML 334 amp! Bonus!