Now for something more radical...
I needed to make a single nostril, so I thought I'd make it as deep as possible.
I used the top of the original twin nostril, cutting away the rest. Using a cardboard template, I cnc'd some sides in mdf to which I attached some strengthening battens and skinned it with flexi ply. I filled, sanded and painted this, creating a perfect mould.
I clamped the mould and remaining nostril together and glassed over the mould, paying close attention to creatin strength at the joins.
The resulting nostril looks awesome!