Hi Bruno,
thx for the tip. I use this tool:
![](http://fenrix.net/logans_lair/09_02_14/03.JPG)
it works really good ans is very fast, but it creates so much dust / powder and THAT's the part I really dislike...
But, only 2 walls to go, and then NO MORE sanding because NO MORE plasterwalls in my gameroom!
![Grin ;D](http://www.dragonslairfans.com/smfor/Smileys/default/grin.gif)