In order to keep Delphi connected and on the bit, I must keep my elbows firmly by my side with my hands in the "box" and use my torso to half halt. (Almost as though I'm holding a dumbell rod and using my core to keep my hands "up" in the correct position.) The half halt can and should be firm and strong, and after Delphi softens I should allow her to stretch to the bit but remember that at this stage I should immediately repeat the process to keep her connected. Keeping my knees soft with my legs back and knees pointing downward helps maintain impulsion. Keep a forward tempo by bending Delphi in then activating the inside hind.