I recently acquired an older Vermont Castings wood stove and I'm trying to decide what to do with it. It is a Resolute Acclaim, 0041, WH 12167, date code 1233. It is missing front and rear grates, plus the andirons,. It does not have fire brick, but has the cast iron back pieces. I am not familiar with this unit, is it a "cat" unit, and what is the combustion package? Is it worth spending the money on the combustion package? Thanks!