The inside of the dradel is foam.
2007.10.19_11.15.17

2007.10.19_11.15.31

This is before felting.
2007.10.19_11.15.42

2007.10.19_11.15.54

2007.10.19_11.16.03

2007.11.25_10.35.41

2007.12.07_14.30.40

2007.12.07_14.30.50

2007.12.07_14.30.58

2007.12.14_10.31.00

2007.12.14_10.31.10

2007.12.14_10.31.19

2007.12.14_10.32.06

2007.12.14_10.32.59

2007.12.14_10.33.42

2007.12.14_10.33.52

2007.12.14_10.34.05

I think it doesn't quite resemble a dradel but it's somewhat recognizable.
2007.12.14_10.34.13