Eyesight issues aside, I don't really think that my layout focus has changed as much as it has matured. I received my first train set as a ten year old in 1972. At that time I was thrilled to even have a train set. Each year at Christmas and for birthdays I would get additional rolling stock of different eras. When I saved up enough money I would purchase a locomotive. No particular road name, just something that caught my eye. Everything was set up on the floor and torn down every night. I dreamed of having a permanent layout, but had no room to build one. I did, however, have time to dream and plan. I wanted a layout with purpose. There had to be industries that could be switched. There had to be scenery. I wanted to keep with one road name for my motive power.
After marriage, I built my first permanent layout in a spare room in the house that we had just purchased. The room was 10 1/2' x 12' in size. There was/is no way to make it any larger. I must state that I like working with limitations. It makes me refine my plans in many aspects. My first layout was 8' x 12'. It had a fairly long main run with several industrial sidings and a small yard. All curves were O31. I added scenery and buildings to enhance the overall effect. I had the beginnings of a Hi-rail layout. I found a couple of New Haven locomotives and cabooses so decided that that would be the road that I modeled. I new nothing about the NH, but I could find a fair amount of equipment in that road. All rolling stock was either postwar or MPC.
When Atlas O announced their SD35 locomotive I fell in love with it and had to have one. I had always dreamed of modeling the Penn Central, as that is the road that ran near our home. While the SD35 was not offered in PC, it was available in PRR. I reasoned that I could run predecessor roads with PC trains. The SD35 had no problem operating on my original layout. One day I stopped into a hobby store and found a scale Lionel PS-1 boxcar. I bought it to go with my SD35. I could not believe the size difference between my traditional equipment and the scale equipment. I began to purchase more scale rolling stock from Lionel, MTH and Atlas O. Eventually, I retired all of my traditional rolling stock and put it into storage.
When K-Line offered the E8 in PRR, I had to have one. The only problem was that it would not operate on my existing layout. A new layout was in order. I dismantled the original layout and completely remodeled the room. A closet was removed, the walls and ceiling were taken down to bare studs and joists. A window was closed in. The walls and floor were insulated. All of the wiring was replaced and a new floor with carpet was installed. I drew up several track plans that I thought might work in the room. I purchased a set of switch templates from Ross Custom Switches. I made several copies of the templates to ensure I had enough switches for my initial track plan layout. I used spray adhesive to affix the templates to 1/8" Masonite and cut them out with a band saw. I laid out the track plan on the floor to see if any adjustments were needed. I made sure that there were adequate sidings for industries, a branch line and a small yard. Once I had my final dimensions, I built modular tables and installed them in the room. I installed Gargraves track with Ross switches on Midwest cork roadbed. I also installed TMCC for train operation.
While the room remodeling and layout construction were going on, several manufactures began to offer scale PC locomotives and rolling stock. I had also purchased several books on Penn Central and began to understand the big picture of the railroad. I studied the various locomotives and rolling stock. I could now begin to see my dream coming into focus. By focusing on the PC I have limitations to the equipment available. Rolling stock from the PC era also presents limitations. I'm okay with that.
The scenery is finished (Ha Ha) and I am now running trains. I do quite a bit of switching. A typical operating session last about three hours.
Did my layout focus change? No, unlike my eyesight, it became clearer as I matured. What's next? Maybe kitbashing some cars or redoing some scenery. But the layout will always be in focus.
Tom