You can create a "spreadsheet" with named cells and refer to those names in your constraints. For example you could create a cell called "cylinderbore" and hav

You can create a "spreadsheet" with named cells and refer to those names in your constraints. For example you could create a cell called "cylinderbore" and have either a static value in it, or a value computed from something else, and you could set a radius constraint to "cylinderbore/2", or "cylinderbore/2 + 0.3" or whatever you want. There's a demonstration in this 5-minute video: https://www.youtube.com/watch?v=b07qbhYHZbU https://www.youtube.com/watch?v=b07qbhYHZbU (Contrary to what the video implies, you don't have to manually click on each constraint whenever you change your spreadsheet, the global recalculate button will do it.)