Ralph,
I have a 4-4-0 from HLW but I hope it won’t damage gears pulling 8-10 cars as with most other locomotives. Ken
Ken the HLW 4-4-0 will have no problem pulling that many cars. Especially if you have level track.
It is an excellent locomotive and our track is level. I wiil have to change the name (and some parts) on ours though. Ken