There are a few ways to do reverse hypers:
You can try to do them strictly, with controlled lowering. The weight here will be low. This method might reflect your natural tendencies towards weight lifting; lifting the weight to the mid point, controlling the descent, and pausing at the starting point. This is an acceptable method but not the most common with the reverse hyper.
The more common way of doing reverse hypers is with a swing. The swing will increase the range of motion a lot, the weight is also much higher. Most of the work is done reversing the swing and locking it out. The impulse applied here is much greater than the first method.
You also have the choice of short strap and long strap. I would use the first method with the long strap and the 2nd method with the short strap but you can experiment with other combinations.