Santa Fe Va,
Very nice clean layout, the reverse loop was suggested, definitely a good idea.
I would also up grade the transformers with at least a ZW and eventually a DCS.
The kids ran our multi level layout all the time, the boys can get a little wild at times,
I find having them help build and learning the cost of the layout, tends to make the kids understand how fast to run the layout. We seldom if ever had a spill from the tracks.
PCRR/Dave