Picked the "more gap" version in PLA at max size on an Ultimaker. Took less than 8 hours and measures in at 73 grams, 25.5 cm long. Would recommend higher infill than what I picked (40%). Lower grabber can shift far enough away from screw to be fully disengaged and move entirely on its own.
Got parts moving and removed supports by hand with a little help from needle nose pliers. Tiny bit of cleanup with a knife. Removing the raft will take ages with sandpaper, might not bother with that part.
Imagine if this model (or future derivative) were printed by NASA in SPACE! Mad props to Daniel for sharing this fantastic design with the world. I feel like I need to buy you dinner sometime.