Your original comment talked about "most commodity PCBs," but it sounds like you really meant to limit your scope to phone PCBs. Laptops, motherboards, microwa

Your original comment talked about "most commodity PCBs," but it sounds like you really meant to limit your scope to phone PCBs. Laptops, motherboards, microwave ovens and whatever else has "commodity PCBs" are much more repairable than the highly size-optimized phone market.