Referring to the above drawing. I want to specify that the toleranced dimension of 3.940"-4.000" stay true a minimum of 1.500" back from the edge.
This is important because the body transforms from the round end to a diamond shape (far left). See below:
A 4" I.D. rubber hose will have to slip over the end of "tube" and I want to make sure that I don't start the transition too soon (hence the 1 1/2" min circularity).
Would that be a circularity GDT or a Cylindricity GDT and how would you show this on the drawing?