I just purchased a jotul 3cb! I am going to install next weekend. Its going to vent up the fireplace. Are the flex kits safe? any install tips would be greatly appreciated. The guy at the shop gave me a piece of black pipe to insert into the rear of the stove and then a stainless steal flex liner kit with a block off plate. I also got a hearth pad. I also have to rip off the wood mantle because of the overhang. I hope the kits come with all the hardware? he claims they do? Also cutting out the damper should be fun! well any tips would be great!