The old Unverferth zone builder is retiring as we trade it in for a new one. My job has been making the 12-row - which I turned into an 8-row earlier this year - into 2 zone builders.
The first was the 6- row pull- type, which was mostly dis-assembly.
The 6-row 3-point-type I built from an empty frame into a full implement. For the most part, it was an enjoyable challenge.