Operations Filter (on groups)
I often find myself sub-grouping for single items, ex. I have a group for smelting high volume (+100 sold/day) bars. In that I have a subgroup specifically for Ghost Iron Bars as I need to distribute these to various characters for creating Living Steel (Transmute Trillium Bars).
What I think could resolve the group clutter I guess other than me is having could be filters on operations, to begin with a simple filtering on items, ex. filter item X from Group A. This way I would not have to create a subgroup to apply a specific operation on that group. The filter would simply be "filter on Ghost Iron Bar" for the mailing operation (ex. send 120 bars to character Z).
I am pretty new to TSM, and I find it to be an absolute fantastic game within the game, so maybe this can already be achieved in some other way, if so please let me know.
It's unclear what you're trying to achieve here.