Hello.

Game returns an error after entering Factorissimi factory, while handcrafting:
The mod HandCraft Timer (0.4.1) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event handcraft_timer::on_tick (ID 0)
There is no valid object with id 162822.
stack traceback:
[C]: in function 'get_visible'
handcraft_timer/control.lua:69: in function <handcraft_timer/control.lua:52>

Hmmm.
I'll have to look further into what's causing this, though thanks for the report.

Please post further suggestions and issues: https://github.com/SirHall/handcraft_timer/issues
(I may not always see them quickly here)