-coefficient(1): omega0^2_1 # omega0^2 for s1
-coefficient(2): omega0^2_2 # omega0^2 for s2 # same as omega0^2_1
-coefficient(3): omega0^2_3 # omega0^2 for s3 # same as omega0^2_1
-coefficient(4): my
-coefficient(5): -1 -> -s1_0 # initial position of s1
-coefficient(6): -1 -> -s3_0 # initial position of s3
+# the following integrator has to be built up manually as THAT only has 5 integrators and we need 6
+# iintegrate -s2' -> s2
+define openamp (variable) -> result
+ isum (variable) -> result
+ connect (FB) -> GND
+
+define iintegrate6 (variable) -> integral
+ openamp variable -> integral
+ connect SJ -> cp
+ capacitor.100nF (integral) -> cp
+# this capacitance requires SLOW settings on all other capacitors. Better use an external 1 nF capacitor.
+
+alias coefficient.1 -> coefficient.omega0^2_1 # omega0^2 for s1
+alias coefficient.2 -> coefficient.omega0^2_2 # omega0^2 for s2 # same as omega0^2_1
+alias coefficient.3 -> coefficient.omega0^2_3 # omega0^2 for s3 # same as omega0^2_1
+alias coefficient.4 -> coefficient.my
+coefficient.5 (-1) -> -s1_0 # initial position of s1
+coefficient.6 (-1) -> -s3_0 # initial position of s3