Hinging on a decision

I really want a way up to the attic above the HT. There is one, which from the HT involves going downstairs. Through the kitchen. Up the stairs to the second floor. Down the hall into the walk-in attic. Up the ladder to the second level of attic. Then avoiding the AC and water heater units to the end of that level, taking a left and crawling to the bonus room attic space. Believe me, when I'm up there and find I'm missing a screwdriver for what I need to do, I pretty much give up for the day.

Enter the HingedIBManifold (tm). I've asked the Cult and got no response on if it is feasable. The idea is that the manifold will sit in a frame on top of the existing rafters. This frame will be hinged to the rafter on one side. With corresponding latches on the underside- and a clever reversed driver on the hinge side, I should be able to get on a ladder, undo the latches and use the manifold as a trap door (can trap doors go up?).

Here's the latest SketchUp with hinges.

Click on it to get a bigger view. Also note the Neutrik panel with wires going to both inside the manifold and to the second driver.

The 'hinging on a decision' part is that I can install the manifold as is, without the frame. The dimensions are the same and it would fit within the rafters- and be somewhat more solid. However, I've pretty much decided that the hinge will happen (translation: I've already bought hinges and latches).