Hi Tobias,

You have an instance of rg.Transform and you would like to convert it to some list of list representation of the 4x4 matrix, and vice-versa. Did I understand that correctly? If so, then:

```
import Rhino
# input: xform2
# deconstruct rg.Transform to python LL
matrix = []
for i in xrange(4):
row_L = []
for g in xrange(4):
row_L.append( xform2.Item[i,g] )
matrix.append( row_L )
print "matrix: ", matrix
# create rg.Transform from python LL matrix
xform = Rhino.Geometry.Transform.Unset
for i in xrange(4):
for g in xrange(4):
xform.Item[i,g] = matrix[i][g]
print "xform: ", xform
```

Why would you like to manipulate the objects, manually by creating transformation matrices?