Hello.  I got this train when I was a youngster.  It has been stored for quite some time.  My grandson is taking an interest in trains so I thought I would fire it back up.  One thing I want to do is add an e-unit to it.  Can someone please suggest which unit will fit best?  I am good with soldering and also building a mount for it.
Also, I noticed the smaller plastic gears between the motor drive and the wheels are worn.  Are there spares that I can purchase for these?  These gears will not last much longer.
And another question is can you tell me where to purchase new brushes and what size?

Thanks for all.  I am excited about getting back into this hobby after over 40 years!

Gary