The umbilical always rubbed on my tophat. When I Upgraded to 0.2, Pandora and AfterSherpa, this rubbing caused the sensorless homing to fail. Extrusions are pretty hard to get, where I live. These extenders raise the tophat by 30mm, so there is enough space between the hat and the cable. Of course, new panels with are needed. I've ordered 4x 212mmx 121mm ones.
Design is based on the BoxZero CornerCubes. My Extrusions didn't fit their cubes, so I pretty much redesigned it from ground up.
The author remixed this model.
Edited mistake in description