So, it's gotta be said that I am... Easily distracted, lazy or simply averse to actual effort. The PC Engine LT that I recognized as 'cap dead' in 2015 is finally getting recapped. Visual inspection doesn't reveal a lot of problems, so I am (perhaps misguidedly) optimistic that I can salvage this.
There are several lists of required caps on the interwebs, but none of them - none! - list the size of the caps, or even specify that some of them are leaded radials, not SMD parts.
So I did the legwork and here's the deets (https://gamesx.com/wiki/doku.php?id=repair:pceltcapacitorlist).