tonight something occured to me and i tested it out, i put the bottom of a maquinas tub flush with a hurleys. the maquinas is a few mm smaller, therefore second tub up from one being vended is not catching on ledge when lifted and its following vended tub straight into barrel

i have emailed mike to inform him, for now put pots in upside down as lid is same circumference as hurleys pot base, works perfect, and they are secure enough to stay on
