Even if you overcome your alignment issues (and they are issues), you are going to rip your SMD headers off the board the first time you try to unmate with so many of them being distributed such vast distances across the board unless you have a separation jig that can pull the boards directly in line with each other. Otherwise the first time you try to unmate it's going to tilt, jam, and then tear off some SMD headers.

My experience was with boards that had a single 2x20 0.100", standard force, through-hole header. The force on all those pins adds up as does the jamming effect as they get farther apart. If they were SMD headers they would have torn off, and you have more pins and they are spaced farther apart. Going back, I would have used different connectors and I suggest you do the same.

Even if you overcome your alignment issues (and they are issues), you are going to rip your SMD headers off the board the first time you try to unmate so many pins at the same time with them being separated by such vast distances across the board. Without a separation jig that can separate the boards directly in line with each other, the first time you try to unmate them it's going to tilt, jam, and then tear off some SMD headers.

My experience was with boards that had a single 2x20 0.100", standard force, through-hole header. The force on all those pins adds up and the jamming gets worse the farther apart the pins are. If they were SMD square post headers, they would have torn off, and you have more pins and they are spaced farther apart. Going back, I would have used different connectors and I suggest you do the same.

You are going to rip your SMD headers off the board the first time you try to unmate with so many of them being distributed such vast distances across the board unless you have a separation jig that can pull the boards directly in line with each other. Otherwise the first time you try to unmate it's going to tilt, jam, and then tear off some SMD headers.

My experience was with boards that had a single 2x20 0.100", standard force, through-hole header. The force on all those pins adds up as does the jamming effect as they get farther apart. If they were SMD headers they would have torn off, and you have more pins and they are spaced farther apart. Going back, I would have used different connectors and I suggest you do the same.

Even if you overcome your alignment issues (and they are issues), you are going to rip your SMD headers off the board the first time you try to unmate with so many of them being distributed such vast distances across the board unless you have a separation jig that can pull the boards directly in line with each other. Otherwise the first time you try to unmate it's going to tilt, jam, and then tear off some SMD headers.

My experience was with boards that had a single 2x20 0.100", standard force, through-hole header. The force on all those pins adds up as does the jamming effect as they get farther apart. If they were SMD headers they would have torn off, and you have more pins and they are spaced farther apart. Going back, I would have used different connectors and I suggest you do the same.