I have a VC defiant encore that I have taken the back off of to replace the refractory chamber and to clean it up. After I have replaced the chamber and gaskets the back does not seem to want to fit properly at the bottom, it does not want to slide all the way back to the sides of stove. I have removed all the gaskets and refractory chamber and tried to put it back on and have had the problem. I was wondering if there was another problem I have and what I may be missing. Thanks for any help and I consider my self to be mechanically inclined but I do not know anything about cat wood stoves or really any other kind of wood stove.