When upgrading the speed of the pressurized reaction chamber speed to 8 the machine stops working converting substates to hdpe pellets. I am using the developmental branch at commit 5baf460.

If I remove the speed upgrades it works again.

Add energy upgrades to it, it won't have enough power with only speed upgrades.

Also would like to take the opportunity to mention that there's a newer commit for the development branch that fixes the nullpointerexception (npe) caused by a miscode. Otherwise, I support the previous poster's comment.

Correct - add energy upgrades :)