No idea how this works, But I made a storage device with SWCH as well, Using GOLD (As a read head, you can use anything conductive), A WRITE 0 (NSCN) Head, And a WRITE 1 (PSCN) Head, By activating them from a different spot while a PSTN moves the head around to the switches. Mine is probably less efficient, But you should check it out, See if you can find an improvement to make on this! (even tho this is from 2016, i just saw that)