I have done a lot of reading regarding how to maintain my locomotives and I am very confused. Most of what I have are Lionel and MTH starter sets, all bought new, with basic diesel or steam engines (I don't have any of these really high-end scale engines, etc.). I am not comfortable at all with taking apart the loco or even taking off the shell, as I am not very mechanically inclined (ask me how I became a private pilot at another time!). Anyway, is taking these appart really necessary? Outside of lubing up the axels and what not, how much do I really need to do? I want to keep these running for a long time but I feel that I will most certainly screw something up if i start taking things apart. Also, I always see in the descriptions things like "dual maintenance-free motors" which I hope really means something. I am curious as to what all of your thoughts are on this. Thanks in advance!