Alternate Airgrip case top

A bit sturdier than the original. Not the tightest fit in its current configuration, but can definitely support something on top of it and can be printed without supports. I estimate if you drop it down 1-2% it would be snug enough to invert and support the tool in the case, but too lazy and cheap to reprint at time of posting. If I ever tweak it I'll re-upload,