So I often have a problem when using my 6 gal fermenting buckets for wine kits with skins. The extra volume added by the skins often causes overflow to blow into the airlock (or even onto the top of the lid). I've read that a 7.9 gal pail should be used for kits with skins (by a company selling a 7.9 gal bucket). However I've also considered upgrading to a stainless steel fermenter with a conical bottom. SS Brewtech makes a7-gal version that appeals to me. Is 7 gal enough for kits with skins?