i'm replacing the catalytic converter but the box/assembly that it fits in really should be replaced too. i have it but can't figure out how to get it into position. i think i have to take the back off the stove. that scares me! i think the air probe assembly needs replacing too as it is corroded. my stove is the encore 2190. anybody got some suggestions or a step by step set of directions for taking this thing apart? thanks! hambone