Despite having ten turn pots in the front, the rail only have single turn pots for adjusting the voltage and current when in current limiting mode.
The voltage control pots have a factor of three to them. The current limit pot on the left channel is 1x, but somehow the right one is 2x. The heck? I won't bother correcting this though without the schematics on hand.

They measure a voltage and that can be adjusted with this single and multi turn pot.

If you ever need to adjust one of these, there's no need to take the whole module apart. You can just pop the front off.

The voltages the modules measure can be adjusted with those single turn pots on the front PCB. Luckily the PCB has holes in it, so you can access the pots from the back.

Everything tracks and displays correctly now. The old filter caps are still fine enough. I will still replace them though, once I get around to ordering them.

Quick look at this little puppy. Fluke 8050A 4 1/2 digit multimeter. I'm not going to calibrate it now. The power button just broke.

Specs are printed on the bottom. Handy!

Luckily, as a vintage tech nerd I have plenty of replacement switches on hand. Probably could've even found the same exact type, if I had went on a little digging tour through my basement. But eh, I won't bother