For me it clear that it is the distance between the extremity points of DIA 328.5 and R2. I wouldn't use R3 at all since it can be tricky to probe and for the R2 I would go with the high point as suggested before.
For me it clear that it is the distance between the extremity points of DIA 328.5 and R2. I wouldn't use R3 at all since it can be tricky to probe and for the R2 I would go with the high point as suggested before.
