Thanks for the info guys, it sounds perfect for the boat. I'll probably leave the Aeropress, my Zassenhaus and Aerolatte milk spinner thingey on board, as a thankyou to my bruv and s.i.l. for the holiday - sometime in September.
I assume it's tweak-proof? No heating/cooling flushes, hmmm pity. I'll just have to setle for a sticker "You are now entering a rotary pump free zone, me hearties" ....... pure bliss.
QC