Hello Hans,
I am also new to this forum and in the process of constructing this
model of the Sagrada Familia. In your photo of the Tower of the
Virgin Mary, I noticed that in the 2 lower tiers (parts A20 and A22), the sides of the large triangles need to be folded back along the
dotted lines which are difficult to discern as they are printed in a slightly
darker hue of the same color. I just want to save you a bit of frustration there are many of these same folds in subsequent steps.
Looks like you are off to a fine start otherwise.
Regards,
Cynthia