Nice little tutorial, RoboChicken.
From my own experience, I find removing the eproxy covering the left side of the TSOP chip (next to the soldering area) would later help test for continuity from the TSOP chip legs to the passkey. I know it takes extra effort but it's a sure way to test if your soldering job was done properly. Also, if you're worry about melting/overheating the board or close by components, just coverup the board with tin foil exposing just the TSOP chip. It worked great for me. (IMG:
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