I have the IXO IV with Angle and Excenteraufsatz since Sep.2011. It is clear that the IXO does not have much power or is fast. The advantage lies in the small size. And in conjunction with Angle and Excenteraufsatz one comes in many otherwise with larger devices unreachable corners. The other essays now available are more expensive gadgetry but who has acquired his IXO without angle and Excenteraufsatz, should correct this error.