I can’t answer your questions, but I’ve got two tidbits, both illustrated by this video:
the thrust reversers were probably used during stopping, which would explain why things tore off upon landing. (if they weren’t used, then my second guess is that air flow is going to be a lot messier near the runway than in the air)
that front cowl is just a cover for the control parts… its made to open easily and looks like it’s just bolted on the underside… so not screwed in overly well.