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Initially posted 5/14/01.

Connecting tube

The connecting tube provides air passage from the cylinder to the chamber. A nylon cap press fits to the rear opening of the cylinder. A short brass tube press fits to the cylinder plate to connect the tube to the chamber. PVC tubing was used. Alternatives: an earlier prototype used a cylinder that mounted directly to the plate and drilled holes provided the air passage. This avoided the need for the tube but required a large rectangular cylinder housing.