I'm not a fan at all of the new plastic mount. Read this https://www.ipcamtalk.com/showthread.php/6033-Flush-mounting-of-new-4MP-DS-2CD3345-I-vs-older-3MP-DS-2CD2332-I-turret-cams
Also, it is easy to steal the cam in the plastic mount, simply turn the bezel (or collar, ring, whatever it is...