XT1040 4.4.4 [rooted] but stock

I'm running 4.4.4 stock on an XT 1040 (the LTE Canadian Rogers variant of the MotoG). I had unlocked the bootloader and rooted the phone, but other than that kept the stock image. About 2 weeks ago my wife, with the same model, was offered 5.0.1 (or some version of Lollipop) OTA. She upgraded no probs (other than hanging a long time on the download screen). About 3 days later I was offered OTA on my rooted MotoG. After running through the download, it rebooted and tried applying the update and got mid way through and rebooted back to 4.4.4 saying there was an error. I tried again, same problem. So I started reading posts and realized that while my image was stock, because of the way I must have gained root the OTA update wouldn't apply because the kernel must be altered.

So, I followed the instructions here (linky) to go back to the stock image, but now it's been about a week and I have not been offered the OTA again. A couple days ago I talked with Motorola about whether OTA is re-offered in situations like mine if its offered once and the guy said no and to call Google to get them to re-initiate it. I'm not really positive I trust that answer since he seemed kind of, well, "level1tech" and seemed anxious to get off the line.

Anybody know if the OTA is tied to your IMEI or google accounts and whether it's likely it will be offered again. Otherwise I'm just going to put on a custom image and be done with it.

TIA