Removable trailer coupling for V70II

Hello dear friends of the motor-talk, after a red light lighter has caused my first V70 a fast end – for me without pain, probably next week comes the new V70. Since the old had the original V70 clutch, and I did not like it so much, I would like to install one of Westfalia (Best. Nr. 320 050) F1: Has someone ever installed it? F2: There seems to be something cut out in the not visible area, doesn’t it? Then I thought about the e-set specific aisch 13 pollig Blinkaufwachung über Summer! No activation required! Q3: Has someone ever installed this, if yes the part is ok and easy to install? F4 Is there a cheaper provider than Rameader? F5: Does someone use for original clutch, only what you can take off is still available Suitable for Bj.03 and everything that is identical. Offers please by PN to me. Best regards, Andi : )