Vorrei che alcune schede di un pannello avessero parti diverse assemblate mentre altre non lo fossero. Come posso effettuare questo ordine??

I have two BGA parts on a PCB, with a 32 bit wide bus with a few control lines and a clock line connecting them. Almost all of these traces are only on internal layers. There looks like a signal integrity problem on the bus. The good news is that the board only has parts on one side, and all the vias are through-all. Can anyone suggest good ways to remove the tenting over the vias so they could be probed with an oscilloscope, or at least be able to solder 30 gauge wire to them?

I’m looking at using a through hole mounted CR2016 battery holder on a circuit but the leads need to be level with the back of the PCB due to size constraints.