No problem. For what it's worth, I used a very similar turbo for a long time with road bikes with skewers and track bikes with nutted axles. I used to stick tea towels between the clamp and the dropouts to protect them (making sure to keep them out of the way of the wheels). I moved on to using rollers exclusively in the end. You can get them with magnetic resistance and set up is much easier.Yes. It's really difficult to find out for certain. Thanks again King. Very much appreciated.