Success! The position of the 5 SMD resistors were easily accessible without having to take the board out of the UM3Ext.  Just had to unplug a few cables and move them out of the way.  Was able to do the soldering with the machine on its side.   Sadly, RIP to resistor #102, who fell to his untimely death.  He gave his life for better surfaces.  He will not be forgotten 😢   The blurry looking purple text looks that way because the ink seeped into the layer lines of the pri