@phooky all the through holes are filled with solder, which makes me wonder if they messed up the stencil on the dev board

@th @phooky Are there any SMT parts on the backside? Maybe they wave soldered the TH parts after they cooked the SMT onto the front.

@th @phooky (If the backside of those holes is a smooth dimple or a smooth dome, I would expect that's exactly what happened.)

@elb @phooky seems likely that it is a side-effect of wave soldering the throughole parts

@th @elb well look at it this way: free solder