Use L-stones for slope stabilization.

70 cm were excavated and filled and compacted with 10 t of lava 0-45 mm. The wall is 13 m long and two meters high. The curve consists of basalt, as does the filling of the gabions. The curve measures 6 m and is between 1.5 m and 0.3 m high.

and here the rounding:

and this is what it looks like today

Hello EveundGerd, what did you pay for the wall (per running meter or per ton)? Greetings

looks great!