It may have been easier to use the non-inverting CD4050 as a starting point. [4050, Hex Buffer, Non-Inverting, DIP16]
I made this with the 4049 in mind and left a line that could be easily replaced by a circle.
I did convert it to a 4049, but haven’t got around to submitting the part yet. I’ve been stuck on another project since November. Hopefully back to Fritzing soon 