Offset Unit Register Drive Assembly (Didde Web Press) with Flexible Shaft #725-505. These units will fit most of the older of the Didde Models. They will fit and work no matter the unit size. If your press has a Register Drive unit that’s similar to this one they will work. These Units were removed by me from a Compu-Press in working order. The wires were cut where they enter the unit from the backside. All you have to do is disconnect your unit and plug in the replacement unit. They also come with the Flexible Shaft #725-505 as seen in the last two photos. My name is Sam Ybarra and I was a former Didde Web Press Service Tech located out of California.