Rich, perhaps you have this figured out already, but there are also small tick marks in the platter and main spindle assembly that should be lined up for balance.
I know this may sound ridiculous, but I had space problems also. My wife had a nice, well built, low profile, wooden serving tray with side handles that fits the entire table and motor assembly perfectly. It makes it real nice for move transporting the table around if necessary. My table is in a difficult location to access and clean, so it needs to be moved once in a while. Needless to say, my experiment using the tray has turned out to be a more permanent solution.
-PB