I'm think about re-boxing my modified SB2 in a metal (ally) box. I will probably ground the box (although I suppose I don't have too since there are only low voltages involved), and I'm wondering what effect this will have on wireless reception. Obviously the external antenna will be unaffected, but there's an internal one too.

Anyone got any thoughts or experience they could share?

Is the existing (plastic) box zinc sprayed, since that seems to work OK?