CP/M CBIOS question

I'm building a BIOS for a Z80 card to use a 32MB CF disk. I started with the CBIOSX.MAC from SIMH, since it's all I had on hand, and it's a running system. When building the DPBs, I have two options. I could create a DPB for each 8MB slice, adjusting the reserved track count to hide the DPB entries prior to the current one, or, I could use a single DPB for 8MB, and do the adjustment in the read/write routines based on the disk number. The former method would allow variable sized disk slices, but I can't particularly thing of a reason I'd want 8MB/6MB/8M kind of arrangement. The latter method uses few DPBs, but basically causes each slice to be of a uniform size. Can anyone make a good argument for one vs. the other? I'm inclined to handle it based on the disk number, but if I'm overlooking a good reason for individual DPBs, I'll switch to that. I've generated plenty of CP/M BIOS (many many years ago...), but never built one for a multiple logical drives on the same media. --jc