I have recently just brought a 35 litre cooler which I plan to convert into a mash tun. I have a problem, I brought this cooler off ebay and didn't notice that it has ribbed edges around the bottom of the cooler. I'm not able to drill my hole right at the bottom but about 3 inches up. I've got a picture here to show you what I mean.
Anyway, do you guys think this will be fine or is their any other way I can get around this problem? I have a 35 litre cooler as I only do 3.5 gal batches.
Any help would be great full.