[EricH]

Originally Posted by joeweber

We attached a threaded rod to one end of the cylinder.
For competition I will have to attach it different. ( Can't drill and tap cylinders - modifying a cylinder is not allowed)

Would it be possible to have the cylinder trip a linkage system, not unlike a 4-arm servo arm actuated on one end of one arm, that would do the shifting? That would also negate the possibility of one side shifting before the other.

Or, you could build a custom sleeve to fit over the end of the cylinder that you can drill and tap (and then pin in place on the cylinder).