The inaugural ride of the De Bernardi! Thanks everybody for walking me through this project. I hope it's not too much of an abomination that I put mustache bars instead of drop bars on it (or the mish-mash of new and vintage parts). The wackiest is the mismatched Veloce/Potenza brakes. I'm really digging it though! It rides so smooth and fast. The coolest part is indexing actually works, which totally proves what Doc/ rccardr and others have said about Shimano's ratios being unchanged, aside from the Dura Ace 740x and I think a couple others. I was planning to just do friction, but I got a Shimano Sora 8-speed indexed lever on a whim, so it's got the new lever, a new Shimano HyperGlide 8-speed cassette, and the '86 RD-6208 derailleur, and it's as crisp as potato chips. I never would've expected that.
The Paul Component brakes were a last-minute splurge to deal with brake sponginess. Not sure if it was those, or the Jagwire compressionless brake housing, or maybe both together, but the braking is rock-solid now.
What a delight overall. Very happy with it. Thanks again to rccardr for the really beautiful frame and all the help.