I've converted my HTC One M8 (AT&T GSM) into a Google Play Edition device and changed the MID and CID so that they match those of a Google Play Edition HTC One M8 in order to receive OTA updates from Google. I used the method of flashing the Google Play Edition RUU file. I usually only flash custom ROMs for a purer Android experience such as Cyanogenmod; however, now that I'm running the purest version of any other version of Android, I would like to re-lock my bootloader and set my security back to S-ON because an unlocked bootloader and S-OFF opens up several security holes within the device which I take very seriously. My question is: can I re-lock my bootloader and turn S-ON without bricking my phone and still continue to receive OTA updates through Google?