Jaktrade,
The Rotary Nozzle is a nozzle that fits in a spray head, but works like a rotor. It has multiple rotating streams that provide great uniformity. It you're familiar with MP Rotators, but not impressed by them, you should try the Rotary Nozzle. There are a few key differences between the two products. Rotary Nozzles have a slightly higher precipitation rate and a lower stream trajectory. This makes for much better resistance to wind drift. Additionally, the Rotary Nozzle is rated for operation all the way down to 20 psi, so it is great in retrofit applications for low pressure problems. Finally, the water vanes on the Rotary Nozzles a a bit larger which makes them more resistant to clogged vanes and/or stalls.
Check out the link in my post from August 18.