Thought I'd share this one while it lasts, the MS engine is due to be nerfed in an update but still while it works it allows you to use high power items without mastering rotarycraft...
In its present form the engine converts RF into rotary power and is capable of 2048 r/s at 2048Nm. Step that up 4:1 to 8192 rad/s and it will fully power an extractor. Its not as much of a waste as you'd think as if you feed it stacked items all four stages run simultaneously.
Details: I'm using a diamond gearbox to convert the power. It costs 13 diamonds to make, 5 to make more than enough gears and 6 to make the shafts. The gearbox needs ONE bucket of lubricant. It doesn't use it up. I'm not sure if steel will even take the torque? If you have access to bedrock gears you don't need this tutorial.
I used a grinder powered by the engine to make the lubricant. This is horribly inefficient but worked, it might be worth running a steel 16:1 box dry initially just to save energy? Correction try 8:1 as the instant a 16:1 box takes any damage at all it will lose a bit of torque and stop powering the grinder.
There's a redstone gate located on the water pipe, detecting "inventory has items". This means when the extractor is empty the engine shuts off, so overall the system behaves like a TE machine and doesn't draw idle power.
I'm not good at gates so I bodged it with a redstone trail. You can't put redstone on the engine to trigger it, makes sense really, and it only responds to a signal pointing to it, like a piston does.