This mount doesn't include the "cradle" that's required for many Magellan GPS's, including the 3000T. If you're like me and threw your first cradle away, I would recommend looking for a different mount; this one is not that great. It doesn't do a good job of keeping the GPS secure when driving over rough terrain.
No cradle:
This says it is for all Magellan Roadmates, but requires some type of cradle which isn't listed here. Can't find the cradles on Akron's website.
Doesn't work with Magellan RoadMate 760:
The suction cup is better than stock, but the foot has two projections on it and the Magellan RoadMate 760's base has one cavity. It doesn't fit.