That idea failed epically. Why? The glass screen extends 1-2 mm below the faceplate, and if I put the phone under it, the facelate extends 1mm above the top lip of the faceplate. 8(
As it turned out though, it was a non issue. it was so loud at dragoncon there was no way you could have heard them ring anyway.
I might grind down the glass screen edges, or see if I can find a smaller diameter replacement for them instead.
(And we actually managed to get Eddie to sign both our farnsworths! He wasn't too keen on signing them, and I was warned they better OT show up on ebay.)
No worries about that though!