I have had my VC Encore 2040 CAT-C for about 3 years. While removing the catalyst to replace it I noticed a screw sticking into the empty area that is below where the catalyst sits. It appears to be coming from where the temperature gage is attached to the back of the stove on the outside. Does anyone know if this is normal? It doesn't appear to be hurting anything but heat may be escaping from around it? Its low enough that I don't believe anything touches it.