That one had me scratching my head and flipping through the book for a while too. You're probably right that a diagram would have been nice touch, although not an absolute necessity because you'll get it figured out pretty quick by just playing with it...

As I remember it... The center port on the 3-line side is the inlet from the tank and fill valve. Treat the ports on each side of the inlet as the exit to the rear retracts (for example). The adjacent ones on the 2-port side work exactly the same so they could go directly to the nose retract. Treat them exactly the same as the one's on the 3-port side except there's no fill port...

The screws in the valve body regulate the pressure going into the cylinders. When the valve is switched, the air is exhausted through a pair of small holes in the valve body somewhere. The thing to note about this restrictor layout is that if the retract experiences any hang-up's in its motion, there's a possibility that it could build up pressure and slam to end of travel when let go. If a relatively large restrictor were placed on the exhaust side of the cylinder, this shouldn't happen. I didn't bother to change it though. The retracts in this kit are pretty slick... Once you've leak tested, they'll hold air for a very long time. I drive the valve with an HS-225 servo but an HS-81 or similar would probably do fine.

I think I've got all the pictures on my work PC so I'll try to post some tomorrow. For now, here's a 1st mock-up of how I did the equipment tray. You can see the RX battery relative to the tanks. Its tough to see the layout in the 3rd pic so I'll se if I can get a few better shots tomorrow.

Regarding PCM vs. FM. I don't fly turbines with FM. Vibration is not the concern here. RF noise from electronics is the key concern. The reason I laid out the RC system on the left and the ECU on the right is to separate the system as much as possible. Although the ECU in this case (along with pretty much every other ECU on the market today) is quiet in terms of noise, it never hurts to separate it and the Pump from the receiver, servos, antenna, etc. I know of a few turbine pilots flying on FM, but its unusual for the most part...

Kelly