cygnet,

The Taurus you see in the snow is a reconstruction of the Crat Picture Taurus as you can read in this thread. The dihedral has to be some more in the future I already discovered by making a picture of the wing identic as the crate.

This only has to do with this special projet.

For my and your (TF) Taurus (see picture) I use the dihedral as noticed on the plan. 4 ½ “, I did measure it and for my wing it is + 110 mm

Reasons,

Traditional, I like the way he looks like and this is Classic Pattern Flyiing.
I also fly under bad weather conditions and the plane flies great, there was never one single reason to change the dihedral, rolling is 100 % slow roll also..
When flying on concrete or asphalt the tips will hit the ground too fast with less dihedral when manouvring to touch down with some crosswind.
I often hear they do give less dihedral to fly knife edge! The Taurus isn't designed for Knife edge and I think the other flying capabilities became worse with less dihedral.
Flying only on rudder I will try also in the future I thought it was possible but not easy.
Last but not least, when you do not change the dihedral you will never forget anymore, it is (nearly!) as on the plan.

Have fun with building and flying the Taurus again you will feel young.
(Do not forget to make a nice picture for that for in your profile!)

Cees