How can I do this?

There's one screw that removes the truck on the bottom, it's very easy to put it back on.

@gunrunnerjohn posted:

There's one screw that removes the truck on the bottom, it's very easy to put it back on.

Is this the screw, John? If it is, should I unscrew it all the way so it comes out totally or just unscrew it a few turns to slightly unloosen it?? This is my first time doing something like so I fear if the screw comes all the way out that I won't be able to correctly  screw it back in place.

That's the screw.  You can see if you can get enough "wiggle room" without totally taking it off, but it's not hard to put back together if you do separate them.  Just don't yank hard and start breaking wires, then it gets harder.

Thanks for sharing your knowledge, John. I was able to loosen the front truck screw you mentioned to  provide enough wiggle room to insert those rear screws. (It took a few attempts to correctly align the screw threads into the holes and tighten them but I managed to do it without removing the truck from the engine frame.)

Tomorrow I'll add fourteen 1 oz. weights equally distributed to the engine shell plus two 1 oz. weights on the frame itself behind the headlights. Hopefully that additional pound of weight will be enough extra weight to make the engine be able to pull the three cars from the AeroTrain set plus five extra AeroTrMain coach cars for a  consist totaling seven coach cars plus the end observation car! 

More weight should help, but the real issue is the kludgy rear truck design.  I've had to "tune" both of mine to get them to track properly.  Once I get them right, they'll pull 7-8 of the cars easily.

After more months than I'd planned, I finally added some extra  weight to my ps 3.0 Aerotrain today - 20 ounces total. Unfortunately, until I lay some track I won't know how much pulling power that extra weight gives it.

Also, John, will you please elaborate on exactly what you've done to "tune" the rear truck design so it tracks properly? Your wisdom and expertise are always very helpful and much appreciated. 

Thanks

Btw, I read a couple people posted that the tach strip was on their engine's front motor but mine is on the rear. So, John, as an MTH tech, are you aware whether or not among the Aerotrain's Proto versions, has MTH ever changed which motor - front or rear - that the tach strip was on?