after drooling in the gallery i am now going to set up my own brew tower,after 4 yrs of k@k and partial mash it,s now time to go for it . i already have a couple of 18 litre ss pots and several smaller ones, i reckon i have the 3 tier design sorted as well as the fitting side of it worked out.but the one piece er 2 pieces left to get is the thermometers,can you fellas tell in your opinion the best type to use and where to get them?