So, I have been searching for a good way to remove and replace a BGA. Nothing in particular. Just want to practice. However, I have been having little success. Since I have no automated machines to pick and place and no x-ray methods after I am done with the process I am stuck using non traditional methods of removal and replacement. Right now I am using hot air and a pre-heater on the underside of my proto board. Since BGA's are extremely difficult to remove I have destroyed a few practice boards trying this method. I was successful only once out of 4 tries. If anyone has a better method I would love to read your success story.