I also broke one of the winged pins and replaced it with 4-40 Nylon machine screws and brass nuts I bought from McMaster-Carr. They are #94605A115 and #95130A110 respectively. Also, to press on the pins while squeezing the wings while holding onto the board is a challenge. I found a removable eraser from a mechanical pencil works great to press as it fits down into the heat sink just enough to be self stabilizing so one had presses and holds while the other just deals with the wings.