had to shave down the lip thats on the inside of the shell. The front side completely and the back up till where the bottom of the door starts. Then shaved it upwards (if that makes sense) a tad till the floor fit flush.
On the floor had to shave one side completely off cutting off the coupler to fit the back of the shell. The front just shaved off around the coupler and it fit in. For the shell an exacto was fine, for the floor had to use a little saw. I will take pics and send them to you tonight.