Default [Q] Hboot 1.57 OS 5.11.401.10 reboot loop

Hi,

I just got a brand new HTC One 7 (WWE, CID E_11) after my last one died. Im trying to root it and install a custom recovery to install arhd or insertcoin. I used htc one toolkit for this. Everything seemed to work ok, but after booting the installed rom (ARHD or insertcoin) the phone reboots after i see the login screen. I somehow managed to reinstall my phone again yesterday, as it was a complete (soft) brick.

I used this to return to stock:
http://forum.xda-developers.com/show....php?t=2759000

Now does anyone know why I get a reboot loop? Does anyone know if i installed this stock rom if I get the normal OTA updates again? And do i need to relock the bootloader for this? I would really like to install stock roms again but I'm a little anxious after yesterday. (I've installed custom roms since the old HD2/HTC desire, and also on my old HTC One M7, never had any problems, I think it has to do with the Hboot).

Hoping to hear from you guys,

best wishes,

Olaf