So basically you cannot make a world with the newest structpro it makes some serious chunk lag occur.

Can you link screenshot or log? It may happens only visually because ADDITIONAL_OUTPUT is false and loading process not showing. It works for me.

I think its an issue caused by IC2 and struct pro after removing that mod I no longer suffer the issue. Love your mod by the way nice to see you didn't abandon placemod ;)

This should not happen because mod don't have any dependencies or connectivity to other mods. Only some exceptional situations can arise. I can't solve an issue without any information. Can you please link me your logs?

I tested IC2 and it also works. So, I guess the problem is not in IC2 + StructPro. https://ibb.co/dvSh0a

Not sure then I apologize for wasting our time.

It fixed long time ago and happened becuase of extended block storage arrays was null