Building a better Guinea and Feather

Step 13 Base plate and support tubes

Originally, the new Guinea and Feather apparatus was going to be bolted to a table during use and then removed and placed on a shelf for storage. The large knurled knobs and handles were going to make it easier to setup and disassemble. We later found a perfect sized typing cart so it became a permanent assembly. The large knobs were replaced by a smaller screw assembly, but the handles remained. Also, I bought black anodized handles because the original idea was to paint all of the aluminum parts black.

The short posts are 1.76" square with a 0.025" chamfer to accomodate the inside radius of the 2" square tubes. They're mirror opposites of each other and are screwed to the base plate from the bottom. The support tubes are screwed to the posts from the side and back by 1/4"-20 socket head cap screws.

The base plate is fastened to the table by two 1/2"-13 x 3 1/2" socket head cap screws. There's a short piece of aluminum with the same hole location and thread pattern underneath the top of the cart.