Schematic: AutoFarm Sorter/Shulker Filler With Transfer Rail - Tileable [​v1.0]

Used in my autofarm builds to sort and deliver filled Shulker boxes of farm product via Minecart to general stores.
The frequency of emptying the farm output barrel is customizable, as is the minecart load size sent.

Operation:

Standard item sorter feeds Shulker loader. Filled Shulkers accumulate in the product barrel until full to specified level.
Once full, a signal is sent via observer to a dropper flip-flop to enable the rail lane. Once enabled, the railcart is dispensed
and will enter the fill station, triggering the Detector Rail which signals the flip-flop to re-disable the lane. Once cart is filled
as specified, it is released back into main rail line flow. Use the Redstone Cakes to tweak hopper and cart timings.

Thanks for checking out the build!
This is build version 1.0 - constructive crits and/or suggestions for improvement are most welcome. :)