When different qualities of products are available also offer "any quality" of those products

Good idea! I just pushed a new version, could have done it for this one :(

Thanks,

but it think it might have caused this:

The mod Filter Helper (0.2.28) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event FilterHelper::on_gui_opened (ID 104)
LuaItemPrototype doesn't contain key fuel_categories.
stack traceback:
[C]: in function 'index'
__FilterHelper/control.lua:52: in function 'get_items_by_fuel_category'
FilterHelper/control.lua:372: in function 'add_items_fuel_entity_output'
FilterHelper/control.lua:307: in function 'add_items_pickup_target_entity'
FilterHelper/control.lua:409: in function 'add_items_inserter'
FilterHelper/control.lua:571: in function 'add_items'
FilterHelper/control.lua:607: in function 'update_ui'
FilterHelper/control.lua:646: in function <FilterHelper/control.lua:641>

Update to the latest version of the game 2.1.20; It's the one that caused this to be an issue.

Ah yes thanks that fixed that. Looking forward to the next version then :-)