How can I automate pad-level customizations in my PCB design using Python in KiCad?
Automating pad-level customizations in PCB design can be done using Python in KiCad. The given script shows how to selectively modify the solder paste margin for the pads of a specific module, U304, in a PCB file:

```python
#!/usr/bin/env python2.7
import sys
from pcbnew import *

filename=sys.argv[1]
pcb = LoadBoard(filename)

# Script to customize pads of module U304
u304 = pcb.FindModuleByReference('U304')
pads = u304.Pads()
for p in pads:
    print p.GetPadName(), ToMM(p.GetLocalSolderPasteMargin())
    id = int(p.GetPadName())
    if id<15: p.SetLocalSolderPasteMargin(0)

pcb.Save("mod_"+filename)
```

This approach is effective for tailoring the solder paste application on specific pads, enhancing the quality and reliability of the PCB assembly process.