I fell in love with and purchased a Jotul Castine woodstove last spring. Alas, we ended up selling the house and I never got to experience it (sigh). Our new home, though, has two fireplaces, so I'm giddy with anticipation of upgrading them with inserts to make them energy-efficient heating options. One fireplace is non-rectangular, though (it's arched on top). Does anyone know if I can even get an insert for this type of fireplace opening, or will I be required to undertake even more costly cosmetic alterations to make an insert a feasible option? Everything I researched on inserts claims that I need a rectangular opening. Any input is most appreciated.