Just wondering, are you working at Eccles later in the week too (Thursday/Friday)?
Reason I ask, is I'm going to be spending Tuesday/Wednesday at MediaCity this week, so it could be worth holding onto my current ticket for a couple of days if you'll be around later in the week to do the changeover.
I don't want to be a hassle, so if Tuesday is the best day to get this sorted then am quite happy to do the changeover Tuesday AM and just buy tram tickets separately.