Ad lib, yes! Good description.
Wheels are fairly easy, there’s a small but busy 2-rail O Scale scene over here. Motors are motors. The main problem is electronics, because reversers etc have to be imported, there’s nothing like them here.
The loco actually came with what appears to be a Lionel pilot truck in the box. I’ve read elsewhere on the forum that they just drop in, but that’s not what I found; it wouldn’t fit at all. I could have swapped the wheels, but I decided to go for the steel ones and keep it intact.
I had to drill the axle holes, because the new wheels have 3/16” axles - the ends are threaded, so you just spin the wheels on up to the shoulder and back-to-back is set.
