Thank you for sharing your feedback. We are pleased that you found many of the features in the Dyson V11 Extra appealing, as delivering innovative and effective technology is central to our commitment. We regret that the lack of height adjustment in the floor cleaning head did not meet your expectations and caused concern for your delicate carpets. We understand how important it is to protect all types of flooring during cleaning, and we appreciate you bringing this to our attention. It is especially helpful to know that your son’s earlier V11 model included a simple mechanical height adjustment that worked well for your needs. If you are open to it, we would be glad to explore alternative models or accessories that offer more flexibility for carpet care. Please contact our chat or voice support team, and we will be ready to assist you. Your satisfaction is important to us, and we remain committed to helping you find the right solution for your home. We value your input and look forward to assisting you further.