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.