In reply to D Berry:
I've found the same with every DMM Highball I've had, never had an issue with landing on the fold. I got an Ocun Paddy dominator, which at first was just simply better than the highballs. Softer landing, lighter to carry, L zip for different orientation. However, landing on the zip on the dominator has caused the zip to tear away slightly where it's connected to the rest of the pad. Makes me not like landing near the fold any more.
Additionally, after quite a bit of use and abuse the top layer of foam has broke in two (though this may be due to shoving things inside the pad to carry them, but I do the same with the highballs and their foam is fine), doesn't seem to make much difference to landing though.
Post edited at 16:11