I havent heard from them and I want to use it monday so I used my compressed air and spun it for a while and now it not sticking anymore. Whether its accurate or not remains to be seen and I may have to order a new impeller for a brand new Kestrel so to me it really doesnt say anything about their quality.They sell replacement impellers. I replace mine every so often with wear. https://kestrelinstruments.com/kestrel-impeller or https://kestrelballistics.com/kestrel-impeller