You should check whether the FindEntitiesFiltered function is still capable of finding entities on transport belts. They changed the transport belt system completely in 0.12.

I guess that would be why most of the conveyor mods haven't been updated :|
I only picked up the game at 0.12.20+ so I ...

Just Spent the Afternoon trying to update this to 12.29
I'm not getting errors anymore but the Splitters aren't working, items just stop when they get to them.
anyone have any ideas?

I've attached a Diff of control.lua showing what changes I've made
(In the Diff, Control_11.lua is the original and ...