You will probably never remove something like a PCI slot with a heatgun ... at least not in one piece. I have transplanted that PCI slot into an Asus K7V (Athlon Slot A CPU) and that fixed that particular PCI slot. I have 2 more PCI slots to move! I have more success with high heat on the heat gun, and I don't turn on suction until the leg starts moving. If it doesn't get all the solder, add fresh solder using the soldering iron and try again.