Member visrealm (Troy) posted a nifty ZIF-28 breadboard adapter PCB design over on Ben Eater's Reddit feed awhile back and I couldn't resist making a 32-pin version. I managed a flush fit between the PCB and ZIF socket by cutting the header pins flush with the PCB, applying liquid flux, and filling the plated-through holes with solder.
Cheerful regards, Mike, K8LH