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Originally Posted by TubaMorg
Whoa! Correct me if I'm wrong, but I thought the use of "alternative" solenoid valves is prohibited! How'd you get away with that? Of course there are valves out there that can control mid-stroke positioning, but we are only allowed to use the solenoids in the kit. You are right, though, that the compressability of air makes positioning pretty iffy...definitely no precision there without a more complex feedback mechanism (such as a pot).
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I thought the same, but a quick search of last years rules seems to allow it.
I will disagree about the positioning, however. We used it to lift our main arms last year, and it worked well enough to seed 1st at VCU and 2nd NJ

Fast, strong, simple and precise enough to lift and position the tetras.
However everything has a place, and this year we use no pneumatics.