Mating the two tables. I had to get the small table at just the right height. I had to level it too. Not an easy thing to do on an uneven basement floor.
This is from underneath the big table. It starts out looking towards the end corner of the big table where the small table plugs into it. It ends up looking at two of the bolts holding the tables together.
This is looking from the small table towards the big. Two of the bolts are shown. I ended up adding one more to the left of the terminal block.
This one makes it a little more obvious from which table we’re looking from.
My HO Slot Car Hobby 
Them bolts are big
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