I don't see how this could be feasible...
Solid Element Ops have to have the operand specified... and there isn't a means to say "anything that is touched", which is what you want. Even if it were possible, how could the 'auto' subtract always do the right thing - it would be the famous DWIM ('do what I mean') command - expecting the software to infer intent.
But, maybe I don't really understand the request...
Cheers,
Karl
One of the forum moderators
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