Some more tips:
First, is don't try to copy any designs you see anywhere. They're almost always out of date, plus the way RoC works, it usually just makes you even more confused. Just take your time, and learn the mechanics of each piece.
Power = Rad * Torque. This is absolutely critical.
For most machines, you are given a power and torque requirement. Use the power needed to select your engines. ( 4 max. ) Next, add up the torque, and divide by the required torque. This will give you the gearbox you need to get the speed as high as possible. This will get your machine running as fast as possible.
For the most part, don't bother building more machines until you have maxed one out. While at first it is faster to have say 3 grinders...you quickly hit the point where the grinder drops to .05s per operation. At this point, it's far more efficient to run 1 at full speed than 3 at any other speed.
Heat based things ( like the friction heater ) need equal torque and speed for optimal heating. ( Obviously though more power is better overall. So, 4096 r/s + 2048 NM is better than 2048 r/s +2048 NM. )
Power converters ( things that move power between mods, such as the magnetostatic ) use liquid nitrogen for cooling now. Many sources of information are missing this still.
If you have a magnetized Shaft Core on you, you will mess up any AC Electric Engines in the area. It doesn't damage them any, but it's something to be aware of because they make a lot of noise and stop working right. Put the core in a chest.
Again, if you remember nothing else I just said, remember to just learn the mod yourself. Do not follow guides. ( A huge amount of the problems people have are based on following guides instead of understanding what they are doing. It's actually a pretty simple mod. Think of it like LEGOs. A bunch of different, simple pieces that can be put together in amazing ways. Much like MC itself. )
