I do not know if anyone has attempted to install a cooling coil into the Speidel fermentors or not...Is it feasibleI Have not found any threads concerning this. I do see where people will put them into a ferm chamber, but I do not have the space available to make one large enough to fit both my 60L and 120L fermentors. I don't have the cash flow to be able to buy a freezer to fit them either....so I think the next best option for me would be to install ss 1/2" tube coil through the lid. It's the locking strap style, so it should accommodate a 8" diameter coil mounted vertically, instead of horizontally like the ss fermentors favor. Is there a reason you could not mount them vertically? The other problem I have is finding where I could get a coil like the one described, with lead ins long enough to put the coil at least 4" to 5" from the bottom of the fermentor. Any thoughts, suggestions, or help would be appreciated...