SANTIAGOP23, I have a solution possibly.
add a second unit there will be twice the power.
I have the exact undecorated model ( has 4 exhaust stacks) which requires one gear replacement. There is binding in the replaceable gear of mention.
the body needs a good cleaning. the VO-1000 is just too long a loco for my intended.
if interested, my email is in the directory.
good luck with your endeavors. you are an awesome modeler.
Leroof