Suprisingly, the DIY Omni that Tape Op published a while back is what I use for my tenor (close miked).
http://prosoundweb.com/recording/tapeop/buildmic/buildmic_16_1.shtml
I have a Rode NTK, Earthworks SR71, Beyer M201, Audix OM2, EV 468's, Oktava Mk012 (modified), ML52 (modified), etc. and...