Lol, you are aware that Dust Funnels essentially do the same that Boxinators do? And you are aware you can loop the tiny piles back to the input filter line after they come out the 72nd size Dust Funnel?
But how am I supposed to fix this issue in general? I cannot change the stack limit to be above 64, and i can also not change the 72nd piles to be 64th piles or something, because real life Maths and prime factors do not work that way.
Not to mention, Item Barrels and Mass Storages which have been set to any type of Dust do accept Dust Blocks, Small Dusts, Tiny Dusts and 72nd Dusts too (and will convert properly towards the desired pile size), so you could use those as “Dust Funnels” with huge Capacity.