After about 30 minutes or so, your epoxy should be cured enough that you can do the final assembly and try this contraption out! Screw in your clamps on either side, screw the steel mounting plate to a tripod with a wing nut and slide that laptop in. Hopefully, you measured carefully and theres just enough space to slide it in there, thus giving the clamp screws plenty of range to tighten down while minimizing the overall profile of the stand. Mine fit, just barely, and secures very well.
The only final mod that I needed to do was grind down the tips of the larger wing nut because it was just a little too tall and was scratching the bottom of my laptop. I also found that to mount it more securely to the tripod you can twist the wing nut and the base at the same time for that little extra torque.
Thanks to mikeasaurus for his version
, and I hope the 'ibles community keeps on improving and modding this idea!