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while i wait for better weather for soldering the case, i started on the steam chests. and the questions for chris start... page 16, post 303.when you chuck in the 4 jaw the second time, you say "Turned the block around, and drilled/tapped a hole in the other end for the oil pipe inlet fitting". the picture certainly looks like you have drilled and tapped a hole. but several pictures later, it has become a boss with external threads, per kozo's print.what am i missing here???