Per Dave's comments "these upgrades are time consuming and complicated, and will require soldering" and "it will be necessary to desolder and solder. I think the soldering is the easiest part" I plan to be
He Who Leads From Behind and wait for feedback from other upgraders before attempting the Mt Everest of speaker upgrades. Also welcome recommendations for the best model or type of soldering iron for the task, as well any other specialized tool. (I've used "high end" soldering irons at work, with features like a temperature control dial.) Since I'm leaning toward ordering three
ELX Ribbon Tower upgrades, I'm sure any tool purchases will be a trivial part of the total cost.