CB Range discussion

I’ve been locking myself in and out of my CB300 for about a month now (with one weekly release to paw off before being locked up again by nightfall). A couple days ago, when I was permitted to take it off for an extended period, I felt some itching. Upon checking, I saw scabbing that matched the shape of the device’s opening. It seems like either my skin has been rubbed raw or the pressure dug in enough to cause slight bleeding. I’m unsure how to proceed since I need to remain locked up (though permission is granted for a healing period), and I worry this could become a recurring problem that worsens over time. Therefore, I am seeking advice on alternative devices or possible fixes. Please note: the CB3000 feels slightly too small for me, which I believe is the root cause of all these issues.