You can see the ladder has been extended by clamping a section of aluminum ladder to my 24 foot fiberglass extension ladder. This got me right to the crotch of the tree and eliminated the need to climb the 2x4 steps screwed to the tree. It also brought visions of a poster I saw in a local business showing various jury rigged things like this and was titled, "Why Women Live Longer Than Men!"
With the first two main beams in place a center mast was installed that provided two attachment points. One for the rope and pulley to bring up tools and materials until the elevator is in operation and a second point for a safety harness line. This point was offset and can swivel so I can work around the perimeter of the Treehouse and not get wrapped up like a dog on a chain.
You can also see the first of the four diagonal braces hanging from a second level support beam.
Oh wow, went as planned, so far so good.
Next up, Phase V Disassembly of the Treehouse and Placing the Floor.