It took $30 off of $600 for me today, so I would imagine that if $45 off of $1,000 worked, $60 off of $1,200 would work (assuming it doesn't raise eyebrows at the checkout). I don't necessarily want to swat that hornet's nest.
On an aside, are we still able to liquidate the $200 Five Back Visa's at the WM MC for full swipes in succession for MO's? I haven't seen them in my store for quite some time, but they seem to be back.