I managed to get a few more things done on the layout.
First and most importantly, I was having more issues with the trackwork. That was my biggest priority before moving on. Upon close inspection, I noticed that the rails were leaning to the outside of the curves in some spots, causing unneeded derailments. Unfortunately, one of those spots was where I had already laid down ballast. To attempt to circumvent removing the track from the ballast to raise the low side, I made an attempt at adding solder to the low rail and filing it until it was right. After about a week or so of doing it to the same spot 2-3 times a night, I gave up on that idea and just pulled the 2 pieces of track from the layout, installed new track pieces, leveled them, and sprinkled some ballast in the spots where the old ballast came up (after doing several test runs to insure that the problem there was fixed before moving on). I also found a couple of spots on the mining line where I had to level the track, as well as filling down some of the plaster cloth over the tunnels that were making the track wavy. After fixing those issues, the track is running well with the exception of my Bowser 100-ton hoppers (3 of which are kits, one is an RTR). My Bachmann Platinum RTR hoppers have no issues (1 did, but it was easily fixed by adding a little more clearance for the wheels). I added metal wheels to the 3 kits that had plastic wheels (the Bowser RTR already had metal wheels), and began experimenting with adding weight to them (I also swapped them over to Kadee couplers). None of those fixes worked. Even with weight added, the kits seem to be too light (on the trucks, the overall weight is actually a bit on the heavy side). The trucks on the kits don't seem to want to follow the track all the time unless it's the wrong way through a turnout (turnout set to straight, firmly pressed against the rail, but the trucks still like to try to make the turn). Maybe I need to brush up on my kit building skills before using kit rolling stock on my layout.
In addition to the revised trackwork, I managed to create the base structure for one of the mountains, giving the train a place to "disappear" for a brief time. I do plan on going back once the other mountain's base structure is complete to perform the final shaping of the mountains, thus allowing me to finish shaping the rest of the terrain. I want to finish the shape of the mountains first to allow me to make the rest of the terrain flow a little better (making it make a bit more sense in how it looks).
I also finished ballasting the main line. I'll wait on the rest of the ballast until I can get the landscaping finished (including grass).
I did do some fine tuning on the Soundbug in the Dash 9, but to no avail. It's still nearly inaudible. It's not a big issue at the moment, so I'll wait until the layout is closer to completion before purchasing a PR2/PR3 and load the sounds into it.
I don't have any updated pictures yet. However, I did take a quick video of it last night to display it's progress.
Here's the link:
http://www.youtube.com/watch?v=XOYOdtrvfdI
Shannon