Theother 9/10of your post is appreciated though. No, not a structural engineer but also not as dumb as you make me or us. I'm not gonna try to weld cast aluminum cause well, it can't be done. I'm not gonna try to support 300lbswith drywall screws. I'm not gonna do whatever half ass incomp thingit is that your post seems to imply.This is just an idea being knocked around insofar. Chances are moreit wont go anywhere. Chances are less it will.
I didn't mean to imply you were dumb,just not familiar with what is involved. Also, it wasn't all directed towards you. I could have politely suggested it wasn'ta good idea, but others already have and have been ignored for the most part. Some of the ideas posted here are just scary and could very well result in someone being killed or paralized. I didn't feel like this was the post to be PC, though I seldom do.
And in fact cast aluminum can be welded, but again, bad idea for something you trust your life to.