Hi,
if you plan to edit the part after doing some boolean modifications you should turn on SOLIDHIST, that gives you a more simple option to change the radius for the inner (subtracted) cylinder also later in your process.
For that case now you can select the inner ring-face (using <CTRL> for sub-selection) and run command _SCALE.
Look to that video which shows one possible solution:
- alfred -
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Alfred NESWADBA
ISH-Solutions GmbH / Ingenieur Studio HOLLAUS
www.ish-solutions.at ...
blog.ish-solutions.at ...
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CDay 2026------------------------------------------------------------------------------------
(not an Autodesk consultant)