Yep--smooth top with the "pincher" screws on the back of the lower tree. I just did notice it appears the screws I removed secure a rectangle shaped piece that mounts flush with the surface of the tree. The rectangular piece is threaded with a larger hole size that allows the bolt I removed to pass through to a second threaded hole. It appears the rectangular piece is what secures the tubes and possibly removed by installing a bolt in the first threaded hole and pulling it out to release the tubes, but not sure. I did try a strap wrench to no avail but based upon the aforementioned there is some reason for this design and makes sense that it serves as a wedge. I am just not sure or what I need to do to release the flush piece to determine if it will release the tubes. Since they were installed by the dealer I am not sure, but it has to be something simple. Someone here must be familiar with style of Accutronix trees. Thanks, Al