Ⓐ Front & back: Lightweight impact-absorbing material as main structure.
Ⓑ Side wall: Lightweight impact-absorbing material + high density foam to deflect side impact.
Ⓒ Head & bottom: lightweight impact-absorbing material + high density foam + HDPE panel act as a cage that prevents from crushing.
Ⓓ Bottom pad: Absorb vertical impact, can also be adjusted according to the position of the strap pin.
Ⓔ Adjustable Neck Brace System keeps your instrument stabilized.
Truly I prefer the dreadnought model I own in terms of design. But I’m fond of the double padding at the bottom, the solid plastic shell that runs around all your cases. Name and details info that saved one of my guitars years ago.
I haven’t put heavy stuff in any of the cases I own (all models) but I’m pretty confident in the global solidity of it all. Where are your bags built? Designed?
So far I haven’t encountered better varying equipment.
Thanks again. I would love an acme 000 model! ;)