My Vigilant Vermont castings woodstove needs new gasket around the glass. I hired someone to regasket the entire stove. I have done the doors and the top. But never window. I have had the stove for 40 years. Does the glass need to come out in order to correctly put new gaskets in. I assume yes. I think it’s a different size also. A bit nervous as the store told me the gasket set was a special order 100$ and I see them online for less then 35$. I am nervous.