After the carrier was delivered very quickly, I've found the following: - Not suitable for ALU-AHK (like most, but I was not aware when ordering - have fortunately steel coupling) - The holding arms to build best to start from, so you can remove the protective film completely and with a little silicone grease under the rubber strips can then also move "wrinkle free" - The anti-theft protection is easily overturn if one takes the vertical bar (without tools possible), so I have the mounting nuts replaced by lockable - Makes very good impression in terms of stability and material, I would buy again at any time