Going aloft on a static line

[CJV]

Hi,
I am planning to go aloft solo, on a pair of prussiks on a static line, employing a mechanism similar to that used by ATN's Topclimber product. For a secondary line I'm thinking of using a spare halyard on a descender at my harness. Seems like a complicated arrangement but manageable. Has anyone tried a similar thing? I could wait 'til I have a skilled hand on belay but think this could work and be safe enough.
Thoughts?