You really don't need 75% power towards thrust, it actually makes your ship incredibly weak. Use whatever is necesary to reach 1 TWR but no more, going for 75% thrust is only viable on medium sized (10k-40k) ships wich can actually reach 3-2 TWR, at best you waste 25% of your power to get +0.3 TWR wich is just simply not worth it, On the other hand you can get +35% max speed with a single mobility chamber, and redirect the free'd up power towards combat capability.
