I fully appreciate that S3D, in this case does require the User to do more work than some other Software.
Everyone has to make decisions as to the suitability, of S3D at it’s present Development Stage, for the intended use.
In my first Post above it was pointed out that S3D does things differently, S3D have declared it their intention to be different. Clearly this Intention plus Development Level will impact on User perception regarding suitability. I certainly miss features enjoyed in other Software, and happy to ‘miss’ paying for the privilege of using those features. S3D provides, on the iPad c/w Pencil Platform, an expanding array of features at a cost that is acceptable. I admit to longing for a few features.
However it does not alter the fact that S3D can produce the results required.
The following is included for the benefit of anyone needing to achieve similar results:
The mathematics required are basic, an Internet Search will reveal this and other solutions.
In this case it seems that 2 Circle Diameters are Known, e.g., 320mm and 125mm.
Assume a Body is created from the 320mm, in the scenario under discussion, one end face has to be Scaled to achieve the required 125mm Diameter:
Formula:- Small Diameter/Large Diameter = (Result) x 100 [to convert to a %]
125 ÷ 320 = 0.390635 x 100 = 39.0625%
Type in 39.0625% when using Transform > Scale to reduce the appropriate face:
Help is always available on this Forum, from the Team and Members, and there is a wealth of information accessible from the Search facility [Magnifying Glass Icon] at the top right of every page.
S3D welcome Feature Requests.