getting the new eko 60 stove in this week. question is what do you use for stove pipe to hook up the eko to the 8 inch chimney. it looks like metric odd ball connector on the back of the eko. the only thing i have found so far is a crimped end of a 8 inch stove pipe will fit inside of the eko flu. will this be within codes?? whayt did the other eko60 owners use?? thanks in advance guys!!