Yes, I'll post some pictures of how that works.
The half megatree actually does not mount to the base per se ... there is a groove in the base "D" ring that accepts the bottom "D" ring rebar (flat side of D) which is mounted onto the pole. We lift up the pole and set this lowest and larger D ring into that groove on the base D ring ... and this allows it to pivot upwards without moving. After that the top just basically rests on top of the leveled base and you can optionally attach from wires between two bottom D rings, but I didn't even do that because the 1/8" aircraft cable guy wires off the top made it so rock solid, it didn't seem necessary. In fact climbing up the back of the half tree with a ladder was extremely stable as well.
My Dad created several "D" rings which mount onto the pole kind of using a muffler clamp type design ... except he made the clamps himself and inserted a key on the pole so I could just put the clamps into the key (to align) and then just tighten with a wrench. So I attached these 4 D rings onto the pole, attach the top onto the pole I believe there may also be some vertical rebar that all attached to the D rings to provide additional stability and rigidity. It took about 1.5 hours to assemble the base and pole the first time. In these pictures I have my old megatree pole and its ratchet crank but none of that was used on this tree, so just ignore it. We also have ropes out just in case it got really tipsy but it never did, so again just ignore them. I was really suprised how stable this tip up tree design ended up being ... I was expecting it to be a lot worse but it was rock solid. Even in winds, it didn't need guy wires to be stable. Once we added the guy wires (taken from my old holdman style megatree using a fencerail post) ... then the tree was super solid. With light added, my neighbor and I were able to tilt it up by ourselves and without anybody else helping.
I don't know that this design is very re-usable to average person unless you are a welder like my father is. But I'm sure a similar design could be done in a more simple manner and materials.
