I'm 270ish and have a couple hangs in my DL WBRR and didn't notice any undue stress.
Was the failure catastrophic or just bending or what?
Was hang angle at play as well or could this happen with the recommended hang angle with us bigger guys?
Are these beefier head end spreaders you mention available for aftermarket purchase? I didn't see them listed on the site.
The WBRR is the most comfy hammock I've owned to date so I'd love to not wreck any of its parts accidentally