Has anyone used conductive expoxy instead of solder to assemble a PCB? I currently apply Pb/Sn solder paste, then pop the board into my trusty $29 toaster oven for a couple minutes. But now I am trying to mount some BGAs with lead-free solder balls. My toaster oven doesn't get hot enough to melt the lead-free solder. I could go back to Walmart and buy a better toaster oven, but I would still have no way to check the integrity of the solder joints. So I am thinking of trying conductive epoxy. This would be for prototyping, not production. If anyone has any experience (good or bad) or can recommend a brand of conductive epoxy that works well, please let me know.
Here are some links: