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I wouldn't get too hung up on the weight distribution issue. CNR often applied water pumps and air compressors on the same (fireman's) side of its locos. Class J-7-c Pacifics, Class S-1-f Mikados and various Class U-1 Mountains all used this arrangement. On the Bachmann 2-8-0, the air compressor is correctly fed by a steam line from the turret (located at the forward, top portion of the cab). Its output line correctly runs to the main air reservoir. The injector, located just above the running board and ahead of the cab, also has a steam supply line running to it from the turret. This, too, is correct. The injector on the model has 2 angled pipes running to it from below and behind. The rearmost line is the water supply line, which on the prototype is connected to the tender by a flexible connection. The forward line represents the injector overflow line, which on the prototype discharges steam and water until the injector "picks up" (that is, until the injector successfully lifts water from the tender, mixes it with a jet of steam, and forces the steam-water combination through the check valve and into the boiler). Running forward from the injector is the water supply line to the fireman's -side check valve. This is correct. Running into the rear of the injector from the cab is what appears to be a pipe. What this is on the prototype is a valve stem for the operating valve of the injector. If I were installing a feedwater pump on the Bachmann 2-8-0, I would remove the fireman's side injector, and all of the piping (and valve stem) I have described above. Since there is little room just to the rear of the air compressor, I would be inclined to mount the replacement feedwater pump below (and perhaps a bit ahead of) the cab. This is a commom location on a variety of prototype locos. To the feedwater pump, I would add a water supply line (aimed toward the tender) and a steam supply line (from the turret). The water output line should be run, in whatever way is convenient, to the inlet of the feedwater heater mounted atop the smokebox. Then I would connect the feedwater heater output line to a top-mounted check valve. (The side-mounted check valve on the fireman's side would be removed, and the resulting hole in the boiler jacketing would be filled and sanded smooth in the process .) On CNR locos, it seems to have been the common practice to run the engineer's side feedwater line from the (remaining) injector to the top-mounted check valve as well. If I were to duplicate this practice on the model, I would remove the supply line from the engineer's-side injector to the the side-mounted check valve, fill and sand the hole, and run a new supply line from that injector to the top-mounted check valve. While I was at modifications to the engineer's-side injector, I would replace the thick "pipe" from the cab to the rear of the injector body with a (scale 3/4" or 1" diameter) "operating valve stem". --John
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