dissecting the space wrench I got to thinking about the problem of it only being for tightening bolts and how to fix that. After some discussion in the comments on a similar video by Barnacules I think I have a solution. A removable center peg that can be flipped to the other side reversing the ratcheting action to loosen bolts. I'm not sure how much torque I'm losing having the bar being removable, but it works and it doesn't require support to print, just like the original, nor does it take up much more build material.
You can download my modified space wrench on YouMagine.