Jason,

those are interesting valves. They claim a shipping weight of 0.70g !! That must be 70g...

I didn't quite understand how they work. Do they require a servo for actuation?

Let us know about the 602's when you get them.

Robart's pneumatic equivalent are here:

http://www.robart.com/retracts/2-5lbPneu.aspx

No details yet.

David.