A source driver includes an output unit and a pre-charge unit. The LCST material or other flowable material then forms a gel in the body such that the object is contained at least partially within the gel and thereby stabilized by the gel such that the object can then be easily fragmented within the body andor retrieved from the body. Each of the positive and negative sections are made up of members that disconnect to open the receptacles and which separate from the neutral section. The printer may include a ribbon positioning assembly disposed within the cavity.