I have both a normal Bosch Professional GSR 12V-15 Cordless Drill and the FlexiClick version Bosch GSR 12V-15 FC. I must admit the FlexiClick system simply grows on you because of its versatility.
Bosch PT Fan, came with a Bosch GSR12V-15 tool-modding video on its YouTube channel. In this article I will briefly describe the different steps to convert the normal GSR into a FlexiClick version.