you better get a solid base on that to prevent tipping!
also from an aesthetic perspective, i think threaded rod looks bad (personal opinion) for a little more cost and effort you could get some solid aluminum rods and have the machinist thread the ends, or drill holes in the ends and tap them so you can use bolts into the aluminum rod, then these will look nicer, with even more effort, they can be sanded and polished to a mirror finish, which doesn't take long with a lathe and a range of sandpaper up to 2000 grit, maybe something to consider some months down the road when you have it working great and want to start showing people, of course

personally i went with a large SS rod right through the center of the cell, so i don't have any rods on the outside, Stans looks the nicest with the ends bolted to the acrylic tube, but the 3/8 thick tubes are big money
nice work