Eggtimer Rocketry Eggtimer Quark Assembly Manual page 12

Carefully solder the lower-right pad. Check the pad with a 10x jeweler's loupe to
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make sure that the solder joint covers both the lead of the chip and the pad on the PC board.
It's very easy to get solder on the chip's lead but miss the PC board pad; a good solder joint
should actually flow underneath the chip lead and bond the "elbow" of the lead to the pad.
___ Now, solder the remaining leads in the same manner. You may have to go back and
resolder the first lead (the one that you tinned earlier).
Go back and check all of the leads with a 10x jeweler's loupe, and retouch as
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necessary.
Right-Hand Leads...