I have two H.O. Spectrum 44 tonners in which I installed LokSound decoders. My only complaint was their tendency to stall, no doubt in large part to dirty spots on the track. I added a lead weight, which was soft and could be formed to fit underneath the engine between the two trucks. I drilled two holes for the screws that attach to the body and painted the weight engine black and secured it with contact cement. The extra weight makes a noticable difference. Just use caution when working with lead, disposing of the shavings properly and remembering to wash your hands afterward. By the way, the cab has room for a little more weight above the window line but after stuffing a decoder and speaker in the engine, I prefer not to tempt fate by removing the body needlessly. These engines really can creep along now with LokSound decoders and not stall.
John C.
Mebane, NC