[Doug G]

Your diagram doesn't make sense, don't you need a solenoid on one of the exhaust ports from the cylinder control solenoid. Anyway - it's not a great solution.

Here's something I see once in a while... Connect two cylinders together!! Maybe a 4 inch with an 8 inch. Now you have a multiple length cylinder (rather long!!) that can extend 4", 8", or 12".