By Post Author Hi Jon, You can use biscuits, dowels or you can forego both and just use pocket hole screws.
This will get a very minimal coat and will dry quickly, minimizing the chance that a speck of dust may get on the table and mar the finish.
The way I constructed it, you can detatch the the tabletop from the base.
Best way to do that is to detach the top from the base and see if the base itself is wobbly usually the wobbliness occurs after the top is secured.