How to convert well directional survey data(Azimuth, Inclination, and Measured Depth) into spatial data

Gents, I'm not sure what the correct implementation or transformers are in FME, but the normal approach to this problem would involve starting from a known spatial reference point (e.g. X,Y,Z in a known co-ordinate system) and then applying trig techniques to every known survey change (degrees Incl and Azm) for each increment of MD. Each increment of MD would typically be related to a fixed physical limitation such as the length of a drilling rod.

+(Current-Previous)/2*(COS(IncCur*PI()/180)*COS(AzmCur*PI()/180)+COS(IncPrev*PI()/180)*COS(AzmPrev*PI()/180))+ PreviousSpatialPoint

There have been some previous posts around building lines in true 3D to allow this to be done in FME e.g. https://knowledge.safe.com/questions/46020/create-line-in-z-direction-only-with-line-builder.html

The limitations around this in X,Y only make the workaround a bit cumbersome, so I'm interested also in any solution for this.