The reactor and turbine could use some rendering performance upgrades.
This is from a single max size reactor + max size turbine

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Profiling:
reactorprofiling.zip

Note that I've not used any reactor glass in either of the builds which is probably also something that could be considered.

Marking this as fixed in dev, there are a couple more improvements I can think of that I will try to implement in 10.1, but it should make a decent start now.