Can anyone tell me if it's safe to add about 2 pounds of weights to an RS-3 to help it drag longer consists up a grade. The grade is fairly steep, perhaps 5-6%. Short of doing a lot of reworking of the track layout, the grade is a hard fact of life for this section of track. My RS pulls about 8 cars successfully up the grade, but I'd like it to pull maybe 12-15. Just about everything in the rolling stock is plastic wheels in case anyone is curious.