Does anyone have any experience with electrical atmosphere controlled kilns using argon?  I am seeking to achieve the very "Best of the Best" using lead-free vitreous enamels.  I use an electric kiln and want to achieve a very clear & transparent enamel when firing my Plique a Jour pieces.  I am working with 950 silver & 18k yellow gold.  Any ideas?  Thinking "outside the box" today.