Spinning Tumblers is a little barrel-shaped object apparently made up of a number of stacked brass disks that are resolutely fastened together. Sometimes the disks will spin freely and sometimes they will be locked… it’s weird… and makes for a fun puzzle.
He's also made the start of the puzzle a lot harder… on Spinning Tumblers you can always work out where you are in the maze, so to speak, whereas Eric’s isn’t quite that considerate – at times it appears as if you are in fact nowhere at all… which can be a little disconcerting!So Eric’s managed to make not only the beginning, the middle, and the resetting more difficult – he’s also given it a new colour-scheme by precision machining most of it in aluminium, with a couple of brass accents as a nod to its forebear. (He’s also given it a handy backdoor for resetting quickly or indeed reconfiguring the maze, just in case you want something a little sneakier.)
Psycho Disks definitely ramps up the puzzling challenge over Spinning Tumblers – about as much as the difference in names suggests – this is not a trivial puzzle – probably best inflicted on other puzzlers, especially those you don’t really like. ;-)