Hi.
A few weeks back I built a cardboard hood with a CPU fan to suck air through the device in case it was a heat issue. It did actually improve the stability of connections somewhat, but not completely, and considering it's winter here in NZ and the cupboard where the router lives is typically at only 10 - 15 deg (C) / 50 - 60 (F), if it needs cooling now what will happen in summer? I'd send you a photo but you have 'attachments' turned off...
"improve the stability of connections somewhat" - it now only drops Wi-Fi connections occasionally (perhaps 1x/hour) and cabled connections stayed up without problems (2-hour skype call no problem, skype phone not resetting/reconnecting on a daily basis, etc).
I tried a factory reset and set up all over again, and it still gives me occasional Wi-Fi dropouts. I'm going to have to take this back to the shop and get another unit / different model. It just isn't reliable enough.