When comedian and radio host Tom Scharpling and Superchunk drummer Jon Wurster teamed up to create a radio show, it wasn’t an immediate success - despite being called “The Best Show on WFMU.” But the cult show found a long life and the duo’s comedic stylings continued to gain fervent fans. The duo has been on the road and came through Chicago on Thursday. They share the secret to their success together on the Morning Shift.