Found Gestras Seat Belt Clip design a bit uncomfortable while wearing the belt and also a little difficult to get the two parts clipped together when installing it.
Made the original design a bit thinner and rounded off the ends slightly to smooth out the corners to make it more comfortable while wearing the belt. Also adjusted the position of the two clips a little to make it snap together a bit easier.
Added Seatbelt Clip v2.stl. Found the previous version didn't stay clipped together very well so completely redesigned the clips.
When assembling the two posts in the middle should be offset from either (not lined up) so the seatbelt follows an S pattern through the clip between the two posts.