Thank you Jeff, Steve, Mike, Bob!
Steve, Yes I am really pleased with the photographs from this iPhone! The resolution should be better, I see the files average about 3 times as large as with the old iPhone.
Everyone, I was looking at it after my last post, then went to get my wife at work. So I tried a couple of quick mockups based on your ideas. The first was to remove the girder bridges and the top layer of plywood, then set the bridges on top of the frame of the lift bridge, shimming up the track with one of those pieces of scrap I have mentioned before. The engine rides high, midway up the girders, but there is plenty of clearance as shown in the third photograph.
Then I laid the plywood back on the lift bridge frame and placed the girder bridges back on as before. I found out they don't use rivets, but little bolts and nuts. I took 6 of the 8 ones out of one of the bridges to spread the girders skewed farther apart at the end in question. I kept two bolts in place so I didn't have everything flopping around for the mockup. There is plenty of clearance now. You can see a nut-bolt pair in the last photograph at the lower right, just to the right of the long switch linkage ties.
I could also make a long bridge like Jeff's paper one as well.
Like Mike said in his reply to Chris' comment earlier, "This is the positive part of this forum! Folks that see stuff others might miss!"
