Cisco 15454 Multishelf

Does anyone have any experience with converting a Cisco 15454 multishelf configuration back into single shelves? A suggestion from the TAC some years ago involved putting a “clean” processor board into each shelf and rebooting it into single-shelf mode. The GUI suggests it’s possible to accomplish this by pointing and clicking (in the multishelf configuration tab).

Any hints (probably off-list since I doubt that this is a platform still of interest to many) would be welcome.