Absent good cause, the Judge arraigning a Defendant shall direct the clerk to assign the case to a Division pursuant to RDDC 104D(4), and schedule the Defendant's next court appearance before that Division. When the Defendant is charged with a felony offense the next scheduled event shall be a preliminary hearing pursuant to RCr 3.10. Absent necessity, the preliminary hearing shall be scheduled no less than three (3) days after the arraignment to insure service of subpoena upon the witness(es). Unless a Defendant in custody appears with private counsel at arraignment, a Public Defender shall be appointed for the Defendant to ensure representation at the preliminary hearing: if the Defendant is able to retain counsel before the preliminary hearing, the Public Defender appointment shall be withdrawn. If the case is held over to the Grand Jury, the Defendant shall not be assessed a Public Defender fee for the District Court appearance.