I have one of the loco drive 9F's which is generally a good runner but the tender is far too light. Removing the two screws on the underside releases the wheels but I can't see how to get inside the tender body. It has what looks like a speaker outlet so I guess it must be possible, My first thought was a removable coal load but, if it's meant to come out, it's very tight. Any suggestions? I should have said, it's a high sided tender and is not the one which came with the loco.
Problem now solved