Solder actually worked well, I shaped it with a Cratex wheel after applying. My only concern doing it for the whole layout is if I want to take the track up in a section it'll make it a bigger PITA. I did a handful of joints to see if it worked well, but I'll reserve wholesale mods for later. Truthfully, the track on the table with the Homasote base is quiet, even with some gaps. It's just the stuff on the elevated section that is noiser. I'm going to add insulation to the bottom of the structure to help that.