My daughters are 8s and both need 8 in this shoe. This isnt a NuC issue, the Logitech nano receivers for mice and keyboards have the same problem with interference from your every day run of the mill PC when you plug them in directly. None of these things are worries on a wired G403, or any other wired mouse for that matter. The heel is perfect; not too high not too low. Bummed. Makes me really sad and disappointed. Both returned & I ordered reefs in attempt to find a new favorite. I am familiar with setting up surround as my main audio is a 1200watt Yamaha 5. 5, i bought 13s and have many trail miles on them. I find this product very frail, unsteady and comes apart spontaneously.