Just purchased a good condition Jotul combifire #1 for our cabin. First question is I need the stove pipe adapter, I think it is 175mm to 6", does that sound correct? The outlet O.D. is about 6-3/4". When I convert the metric measurement I get 6.88". Second question is the flue outlet is out the back, I would like to make it go out the top. Is it a good practice to try to remove 30 year old stove bolts or am I asking for broken bolts? I have not tried removing them yet but have concern do to all the thermal cycles they have been through. Third question is does anyone know the installation clearances for this stove? I have tried to search this with no luck. Thanks for any help provided.