I've been using the machine for about a week now, and the only real issues, apart from the occasional piling, is that the carriage seems really loose. I can see it vibrating away, especially as I type on the right hand of the page. 

For those that have the same machine: do you also find that the carriage tends to run on the loose side?
 

Thanks again Pete for the photos and notes. I completely removed the brake, reformed it to look more like yours, and reinstalled it. Now the tab brake works (slows the carriage down), and the tab arm doesn't drag on the tab stop rack anymore. Seems to work pretty well, in fact.

Interestingly, when I had the brake out of the machine, the face of the nylon disc showed no wear except for a little rubbing on the corner of one side. It looks like this brake was never correctly positioned.

That makes me wonder: Did the Dutch factory that made this have poor QC or highly inconsistent product by this vintage (1965)? Or was I just lucky?
 

My apologies. I thought it would convert them on upload. Oh well.

Here they are again, with the descriptions repeated:

(These images should be clickable to see bigger)
Back of carriage with the set screw that I think is supposed to contact the tab brake just left of center, mounted on the same rocker axel as the tab arm (hiding behind the spring just right of center).


Different angle, you can see the top of the copper arm (rounded end) for the tab brake, and where the set screw is in relation to it. (This time, the tab arm is hiding behind the bell hammer arm).


The tab brake (white plastic disc, from the side). Seems really far and low from the carriage.


From the bottom of the typewriter, you can see the tab brake. Still seems out of position. It's in a tricky spot to try to form the arm, and one of the screws mounting it is also an adjusting screw for the escapement, so taking the tab brake off means re-tuning the escapement. (This machine seems to have a lot of parts that serve multiple purposes - like the way the platen axel holds so much of the carriage together).

Pete, do you still have your Parade's out of their skins (or remember how the tabulator works)?

My tab set / clear assemblies were all out of whack and the set wasn't even on the axis right. That's cleared up now, but there are still issues:

1) The tabulator arm (the thing the tab stops hit to stop) comes up really far, dragging on the tab stop rack.

2) The tab brake (little white disk on a copper arm in photos below) seems completely out of position - the set screw on the tab (vertical screw that goes nowhere in the first picture) doesn't make contact with anything in lowercase position and just touches the tab brake arm in caps position, but the tab brake is too low to contact with anything.

The repair bible doesn't have anything on the tabulators, so I only have the parts diagram which, since everything's floating in the diagram, I can't tell what interacts with what. 

I *think* the tabulator is supposed to press the tab brake against the carriage rail, and that pressure may also act as a stop to keep the tab arm from colliding with the tab stop rack. (Though, there is also a stop at the front of the machine I could form to tweak it). 

(These images should be clickable to see bigger)
Back of carriage with the set screw that I think is supposed to contact the tab brake just left of center, mounted on the same rocker axel as the tab arm (hiding behind the spring just right of center).


Different angle, you can see the top of the copper arm (rounded end) for the tab brake, and where the set screw is in relation to it. (This time, the tab arm is hiding behind the bell hammer arm). 


The tab brake (white plastic disc, from the side). Seems really far and low from the carriage.
[url=https://postimg.cc/V5TPyCyv][img]https://i.postimg.cc/QxN8TQ0Q/2

Sorry. It's not a / dead key but a dead key with ` and ´ on it. I assume it's for diacritics for other letters like é and è.  I used the / just to differentiate the two diacritics, but that was a poor choice.