I printed the model in PLA and PETG with no problems at all. It was printed as per the original.
The author remixed this model.
Having printed the original design specifically for my to use with my Olympus 100-400mm lens, I noticed that the tripod foot did not sit flat within the recess. Checking the tripod foot I discovered that it is slightly wider at one end. I made simple changes within Tinkercad to produce a correction, which now fits cleanly and snugly to the tripod foot on the lens. Please see the photo which shows the difference in width between the original and my remix. I guess this will be a little loose for the 150-400mm lens.