Well Ghouls, it's not totally awful yet. I think it has potential and I don't think we have to start over! That's the good news. The bad news, while not difficult at all to move the wall, is that the motion is totally not smooth. OK maybe it's smooth for the first foot and a half but after that you run into problems. Right off the bat it was apparent that the single bolt in the 2x4 block supporting the wall frame was not going to work as it constantly was rotating up into the I beam and jamming. I added a second bolt which did help (see image arrow). We also stabilized the blocks with a spanning 2x2 ('Back support strut' in the second image). Both of these adjustments
made it easier to move the wall but it appears that finding a proper center of gravity that will allow the wall to move uniformly forward will be a challenge, and figuring out how to move it reproducibly. The other problem appears to be that the wall frame has a tendency to swing back and forth as it is moved.
So overall I think this design could be made to work properly but it does need some help.
Next step I think will be to finish the basic 2x2 wall framing so we can see what the additional weight does to the tracking...and go from there
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