Hiya Troll, nice to meet you :-)....Culverts are cool, they have wonderful accoustics, all the ECHO and REVERB (do they still call it that?) you could ask for- I cant help but think they would enhance the scream bit. I've always thought it would be lovely to let loose a few wild, high, keening kinda tones in one of those fancy type marble buildings that echo so nicely, but wouldn't the suit folks stare at you funny?