So the cockpit glass command in user.cfg is working
gp_option_ShowCockpitGlass=0
Just that another system file overides it a few seconds later, making it appear.
1st without cockpit FRAME and no glass.

2nd = cockpit FRAME reappears a few seconds later. I just caught the screen 6 mins ater.

Speaking of this. I think the GLASS is infact removed, just that the cockpit frame is backed_up. Not the glass backed_up, because see next picture, cockpit glass in full essence and meaning and in beautiful effect.

So, what's the command to remove the FRAME? could it be
gp_option_ShowCockpit=0
???