Reducing width of Xiao by milling off castellated holes

Hello, would it be viable to mill off the castellated edges of the Xiao board to reduce the width of the board?

The board is a bit too wide for my application right now.

Which board, I see some VIA’s under microscope and a Resister next to PMIC (sorta looks like) you could trim back to the Beginning of the Holes? Time to go Frankenstein on one…LOL
GL :-p

The NRF board without the sensors

I sanded off the castellated edges and 3/4 of the diameter of the holes on the left side of the board. The board still works.

LOL, Nice… :grinning: Getting real small now…
GL :slight_smile: