"Mizze-ion Accomplished". The Mizzen mast is completed.
First in detail and then zoomed out.
Also managed to tighten the rigging of the shrouds on the starboard side:

And was able to lay the loops in the running end and secure them.
After that, all lines were tensioned correctly and secured. And fitted with the coiled lines.

At the 3 cleats at the foot of the mast, it requires a bit more squeezing with lines than on the 1:1. Because I cannot lay lines on the belaying pin rack on the starboard side. Therefore, some lines were combined on some cleats.
At the arrow that made me happy: the planned splitting of the rigging with the small magnets works! The rigging stays taut.
A bit from a front angle:

The sheet of the mizzen topsail has also been installed. That is a kind of continuous line that runs through 2 blocks on the gaff, with both ends secured at the foot of the mast. I will try to describe setting the mizzen topsail and mast below. Hopefully, I can clarify this next month when we go sailing with the Balder.
According to the old specifications, the topsails are set on the starboard side.
The sail is first secured on deck to the detachable topmast.
-The starboard end of the halyard, which runs over the sheave at the top of the mizzen mast to port, is then secured to the topmast at approximately one-third o the way up.
-The tack is a loose line that is secured to the underside of the topmast.
-As the sheet, the piece of line running diagonally down along the mizzen sail is secured to the clew of the sail.
The topmast with topsail is then hoisted up along the starboard side, past the mizzen sail, gaff, and peak halyard.
Once the topsail is set, the clew comes to rest just above the end of the gaff. Then the clew is tightened with the sheet via the block at the end of the gaff. The sheet runs along the gaff to a block under the gaff's claw and is then secured at the foot of the mast.
If the wind comes from starboard, the topsail presses partly against the peak halyard. If the wind comes from port, the sail becomes loose.
A photo from the book 'Uitgezeild' on page 132 of the Katwijk KW.105:

The mizzen at approximately the same angle as my photo.
A overall picture:

The work at the front with the mainmast and jib boom is next.
And a comparison picture:

Even with my 14mm fisheye, it didn't work out well. The problem is that the starting point is the shot on the left, taken with my iPhone. Next time, I should use a photo of my model as a starting point and then try to capture a comparable 1:1 representation.
Regards, Peter