hello.new to forum,have been reading posts on here for a few weeks and really like site. i have a 1992 defiant encore that been run hard. i got a hold of it a few weeks ago and have torn it down.the lower fireback was warped and cracked.catalyst was disintegrated and area full of ash. the combustion throat was warped.OUCH,burned HARD.on the plus side,the refactory is still solid,everything is there and after reading the posts on this forum im convinced its restorable. have purchased lower fireback,throat,gasket and gasket kit from blackswan.will check all seams. my questions are as follows.1-is there gasket material for upper fireback? i assume there is.mine had none but i see channel and i downloaded manual and it says 3.5' of 3/16"used.howevr,maintenence section does not mention it under other gaskets.do i use the 3/16" and is there any other areas on this piece to seal? 2-there is a broken off bolt that appears to hold combustion throat in place along with the tabs.am i right? its 1/4" threaded,but how long?its on bottom of upper fireback,to the right and casting has indentation as does damper.sorry about extensive post,new to these stoves but i am willing to learn how to fix anything and this stove IS going to heat my home for the winter and hopefully many more to come. thanks in advance for any help-chris