I had the original BT3000 forever ago, And loved the saw. I eventually sold it to another BT3 user who mounted 2 of them together. I found the BT3 central forum a great resource for tips and advice.
The sliding miter table is very accurate, you may have to follow the instructions on tuning it. If I remember right there are some square pieces on the bottom that take out the slop.
You can make a miter slot if you want one, or make yourself a sled that hugs the motor body.