Also just to add to the information. If you go directly to a wide body seat you're protected (ie you don't have to repay the passover). This has already been done.
If you bid ANC MD11 and some nuggets get activated prior to you, it will trigger WB-F/O passover.
Another piece to that puzzle, if you bid ANC MD11 and get a training date, but then bid to another domicle in the MD11 before you get to training, you'll keep your original training date and get a lateral transfer date and your passover won't be affected.

Hope that didn't muddy the water too much.