I guess I'll get myself some new gaskets and lop the little jug off again and take a look :(
Unless, of course, after this exhaust clean up it is cured. About to head to an exhaust place now. I don't have the angle grinder and welder to muck around with these messy spot welds on the baffle, one of which is about 1 inch x 1 inch. Whoever owned it obviously didn't understand the importance of being able to clean out the pipe every now and then on these smokers.