Thank you for pointing out this occurrence and possibility. I for one do not have any cracks that I can see. ~knock on wood~

gristle's comment on the glass-filled parts immediately brought me back to circa 1987-88 when I bought my Kyosho Optima 1/10 scale R/C car. It was the/one of the first to use glass-filled nylon in it's suspension arms. I had completely forgotten this material and even the possibility that it could be used in the housing for the 770. The smooth but seemingly textured material is likely the same which was used for the high-strength/stress R/C car parts.

I don't recall ever breaking any parts on that car made of that material despite it being a 4wd and offroad vehicle.

Nonetheless, I will be extra cautious when plugging in items to my 770. I don't see much likelihood in having anything plugged in simultaneously for my needs at this time, so that will decrease the possibility of generating stress.

I wonder if your devices were subject to mishandling before delivery, even if not cracked upon arrival, but stressed to nearly the point of cracking. Or even exposed for a longer period to cold temps which made the casing more brittle. Maybe next time they'll use something like carbon fiber?

Thanks again, and I'm sorry it had to happen to any of us.