Hi Danny - the problem I see with that, is that some combinations wouldn't really do anything.

Like for example if you extruded something towards the outside to make a protrusion, but had it set to Boolean: Subtract, that would produce nothing since you would be subtracting something that is exterior to the solid.

Same thing if you extrude towards the inside to make a depression but had it set to Boolean: unite.

So I'm kind of thinking it would be better for MoI to try and automatically figure out if it was supposed to be a union or a subtraction, depending on which direction the extrusion is going... Also that way you wouldn't have to flip that UI setting around to different values each time you wanted to switch between doing a protrusion or a depression.

Is there some particular situation that you would see an automatic determination based on direction not doing the right job?

- Michael