Hi guys. I just fitted the sock on to my new heaterblock and it doesn't appear to fit as well as the ones displayed on the E3D website. I'm confident I've fitted it correctly. The nozzle only just pokes out when everything's cold but as soon as I heat up to 190C, the sock expands and the nozzle is no longer protruding. Hopefully I'm doing something simple wrong. Can anyone suggest a way to combat this? I've posted images below of what I mean.