Order a separate firebrick lid with 2” x 2” high-temperature window for a FireFly that you already own. Remove the existing lid, drill holes in the stainless steel band of the new lid, and install screws.
Watch the bright red kiln interior through the window. (The glass is rated to 2300°F.) This is especially convenient for glass fusing. Watch your glass treasures progress through every stage from tack fuse to full fuse. (Note: always wear firing safety glasses when viewing the kiln interior.)
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