To clarify some more - we tow behind a Pawnee using a 120-foot rope
and my Discus 2 has a nose hook. On tow, the Discus has a notable
nose-up attitude, so the 20 degrees I report is the apparent angle
from my seat. I am positioned immediately behind the towplane just
above the wake. I did have one tow last year in which I was unable to
maintain low tow and had to release.

The pull of the towrope can exert a moment if the force vector is not
aligned with the center of mass of the glider.

The catenary depends on the weight of the rope, but is very notable.

Mike