Update! Its fully functional! I ran out of air line so the storage siding is not plumbed but main layout is all plumbed!   The controls in their raw form red levers are the decouplers ... Up for open down for closed.  Blue are the switches up for diverging down for thru And without further delay ... Some operation.  The lego magnets are unreliable at best so it adds a bit more fiddling than I would like but it does make the puzzle have an extra challeging element.