Updating to Today...
Vince:
Seems a lot of us model building types have different hobbies than just model railroading!
Layout...
Wednesday, 2/13/19...
I didn't have a lot of time to spend out in the hobby hut, but LOT'S of chin scratchin' went on that day. Also, a LOT of piddly-diddly stuff that takes time, but once done you don't really see substantial visible progress. However, by the end of the work session I had the remaining portion of the lower stage, as well as the reverse loop area, tacked in place. I will need to radius the reverse loop shelf edge, too, but that will wait until the bench work for the lower town is in place so the two can be cut at one time.
Here's a pic of Wednesday's accomplishments:
See that little yellow speck over against the wall toward the loop area? That's a Mantua Rogers 10 wheeler (handiest I had within reach at the moment). It's sitting approximately at the clearance point of the "main" in the stage area. If desired, there could be train behind it all the way past the left edge of the picture!
Also, the inside of the reverse loop: I will have a small mechanics scooter in that corner for use when I go to the inside of the reverse loop for construction, and later, for any maintenance/repair that will need to be attended to. I tried it out and it's going to work fine. REALLY fine as my knees continue to age!
Thursday, 2/14/19...
Didn't do much in my hobby shack, first time rain wasn't threatening in weeks, so I went for a ride on my dual sport motorcycle down in the Ouachita Mountains. I rode a portion of the old Frisco's steam era helper district down near Talihina, OK. I love going to Talihina. I love the country, I love the culture (it's pretty much the capitol of the Choctaw Nation), and I love eating at Pam's Hateful Hussy Diner. It was high overcast and not particularly good for photos, but I enjoyed the outing. Here's a few pics of the old Frisco's line...
An overall view on my way over Winding Stair Mountain to reach the roadbed portion...
Then I turned onto the roadbed and started upgrade. Here's that view looking upgrade. At this point, the trains w/helpers would be getting a run leaving the little helper town of Bengal, OK (originally "Indian Territory" when the Frisco built through here in 1887) and gathering up as much of a run at Winding Stair Mountain as they could muster. The ascent would involve 2.25%, 2.6%, and even a short stretch of near 3%. The Winding Stair Mountain grades (both sides were helper sections) were short, but steep, and it played havoc with the Frisco's the operations over the Ouachita's.
And lastly, a couple scenes along the grade...
I love living in the region I live in. 
Layout...
When I got home and unloaded, I went out to piddle about in my hobby hut, and thought I'd see how well my compound ladder to the stage tracks would line up with the track C/L's I had drawn on the raw plywood...
Nailed it!
FWIW: There will be two tracks of 10' length, 3 tracks of 9' length, and two tracks of 8' length.
Friday, 2/15/19...
After getting back from my supplies trip to Fort Smith, out to the hobby hut and finish installing the angle supports and measure/cut/fit the base for the lower level's "Town A". (I'll get around to naming my towns eventually.) Here it is tacked in place. Still more underpinning work, and still that radius on the return loop shelf to cut.
That stretched out tape measure is 10'. Wanted to see how a 10' train would look on this portion of the bench work. Also visible is my HVAC unit and my stereo unit. I like to have the oldies station rockin' while I'm doin' my thing in my hobby hut.
And the same deal with the stage area: Wanted to see about what the visual impact of a 10' train would be like...
(That's my temporarily re-purposed work bench over there on the left.)
That catches me up on the layout's status.
Now, Lee asked a serious question about height, so instead of being a smarty pants, I will now address that:
I'm 6'1".

Okay, SERIOUSLY...
I've learned by experience that building a multi level is an exercise of compromise. I learned from my tri-level layout that a lower level can be too low, and an upper level can be too high. The idea is to find the compromise for your stature, and the "givens n' druthers" the layout imposes. In this case, that ended up being:
* Lower level railhead sits at 39" above the floor.
* Upper level railhead sits at 58" above the floor.
The lower level height will give "acceptible" viewing of the lower level when standing, and EXCELLENT viewing when seated in my comfy rolling office chair.
The upper level height I've dealt with before on another layout, and operationally it's fine, but when it's time to work on the upper level, a small step up is nice.
No, it's not ideal, but 'ya do what' cha' gotta' do when 'ya gotta do's it so's you kin have what 'ya wanna' have when 'ya wanna' do's it.
At least, that's my story an' I'm a' stickin' to it like tick on a dog's ear!
All fer now!
Andre