Hello Everyone-- I have an HO-Scale Bachmann Spectrum F40PH and want to add a little more weight to it (6 ounces to be exact). I added 2 ounces by filling the fuel tank with lead. I would like to add 4 more ounces; but, I don’t see where more weight can be added. The chassis fits snuggly against the shell. No room there. Very little space exists between the top of the motor/circuit board and the shell's ceiling. I don't want to place lead weights near a decoder or on the ceiling. Any ideas where or how I can add more weight? Thanks, Steve Williams