Someone might be surprised that I didn't do this first, but LittleSixteen can now have either 16kB or 64kB of RAM (and maybe even 32k too, who knows?). This is probably the most common modification done on C16s, which requires some fiddling with the tracks on the original board while it's as easy as moving two jumpers on ours. There's no reason not to keep them permanently in the 64kB position, unless you come across some (alleged) software that only works with 16kB. If you are really worried about that, you can wire a switch instead of the jumpers and change at will without opening the case. Or you can fix the software, which would actually be better.

I placed the jumpers right of the modulator, just above the diodes I had to add for the PLA16V8. That turns out to be a very handy spot for anything that has to deal with the address lines.