a64,
I did a little
research after you PM'd me. Here's a
photo of a
Rocna 25 on an IP 35. I found it on Hayden Cochran's
Island Packet Yacht Owners Association website. In fact, it's Hayden's
boat.
How the bail on the
anchor roller interacts with the "roll bar" on the
anchor is the deciding factor on how well the new-gen anchors will fit. Looks like a pretty good fit to me, with plenty of room, but it would depend on how similar your anchor roller setup is to the IP35's.
If you're not familiar with the
IPYOA.com, you might want to join up. Hayden is just about the most helpful guy in the world, so if you have any questions just ask.