the window is a great idea- i'm planning on building a rocket stove soon and might try this if i can find an old stove to recycle the high heat glass from. i think it could most likely be cut with a tile saw, that could save some money. i think i paid 90 dollars for mine a few years ago and i cut all kinds of stuff with it. borosilicate glass, wine bottles, stained glass, etc. i'll post here if i manage to cut some high heat glass successfully.
