Video at Amazon.com: hello to all undecided, I am very satisfied with the Gurtwickler GW60! All settings are very easy to adjust. (Very easy) The dimensions of the housing 117x113x34,5 mm from GW60 I am very surprised at the power the engine has to my terraces open blinds! Have installed the Gurtwickler subsequently. All in all, we are satisfied, the price is also great!