Hitec HS-225MG Mighty Mini BB MG Servo U
 

Will this servo Hitec HS-225MG Mighty Mini BB MG Servo U work in a mini T? i have an upgraded radio, mamba comp X 3s lipo, and the integy graphite chassis

That is a fairly big servo. I don't own one but when I saw one in a modified MLST I thought it was a standard sized servo until I saw the numbers. You really need something smaller like a HS-85MG or even a HS-65MG (smaller than the 85MG). Part of the problem is that there is a brace that sits above the servo and the shape of the well that the servo sits in restricts the size of the servo that you can use. On my fairly stock Mini-T I run a Futaba S3101 servo and it works quite well. I had to servo tape it into place because the standard servo mounts just wouldn't work.