Good afternoon Gentleman, Sure could use a bit of advice here, I am ordering my double wall smoke pipe Selkirk, will I need a stove collar to double wall pipe adapter for the PE Spectrum? or will the double wall pipe slide on the stove collar? This would be the adapter I am referring to http://www.stovepartsplus.com/Merch...Product_Code=CP-77360&Category_Code=SUPRPDBL6 Thanks guys