I have been transporting my carbon road bike in the back of an estate car when I need to take it with me. I have a few weekends away planned with the family when I will have the opportunity to cycle, but I won't have room in the car. I will be towing a dinghy so tow bar bike carriers are out. Anybody have experience with roof mounted ones with carbon frames. I have used carriers which clamp the down tube, but only on aluminium MTBs. OK with carbon? I could use pipe insulation around the down tube where it is clamped. What about carriers that clamp the front fork? Are they a better bet? My bike is not too flash - a Focus Cayo, but I wouldn't want to damage it.