probably find a new or like new 950 Eclipse coil pretty cheap to replace it because there is a very large following of MXT users who NEVER or VERY SELDOM use that coil.
Reasons? They opt to use a smaller coils, such as the very good 5.3 Eclipse, in order to have a better-balanced, more comfortable feeling unit that handles trashy environments better. Or they have opted for one of White's DD coils, or an after-market DD coil, such as one of the EXcelerators, for the smaller size and/or DD design for handling higher mineralization and/or picking between dense trash.
So, when your MXT arrives, get out there and use it a lot in order to learn it. In trashy or very trashy environments you're going to suffer from good-target masking due to the size and shape of the 950's electromagnetic field. It will do 'OK' for a lot of hunting, and then when you can afford to get a newer coil, you'll have a better appreciation of the benefits of a smaller-than-stock coil for trashier sites.
Monte