Maybe a bit late but I moved a table 4.5x9 regulation billiards I bought from Kijiji. Anyone else who is thinking about doing this I have a couple of recommendations.
1. Make sure you are the one to take it apart, that way you know how it goes together
2. Get the largest level you can find and take the time to prep/level the base before you lay the slate and attach the rails.
3. Have strong helpers.. slate is heavy..
4. Work the felt in a logical fashion when tightening it (watch a youtube video)
5. (Maybe the best tip..) Use automotive bondo to fill and sand the cracks between the slate. I was given that tip by a billiards place and it proved to be a good one.