A bow string release includes a retention portion having an interior area for containing a portion of a bow string and a barrier for selectively separating the interior area from an area external thereto. A steam tunnel sub-enclosure includes exhaust ducts collecting steam at the conveyor’s entrance and exit thereof to prevent steam from being released into the rest of the oven where it might interfere with ignition control equipment. Also provided is a method of estimating skin fold thickness. The synthesis tool searches the in-memory synthesis intermediate format to find arrays for each process.