Apollo's Chariot has pnuematic friction brakes. B&M mag brakes were developed shortly after in the early-mid 2000s. Griffon uses them as trims to slow the train down to a more manageable speed just before the main run of friction brakes on the MCBR and final brake blocks. B&M uses magnetic brakes much more on their installations nowadays but still only as trims, never by itself in a block.
I wonder why that is. Magnetic breaks have a great built in failsafe and would seem to help with the slamming because Apollo isn’t the only one suffering from this as a couple of others I’ve been on have too.