DoubleDAZ posted:John, that's a good attempt, but the "S" curve should be avoided and the tracks across the opening appear to be too close, but that will be determined by your bridges. There is a 2nd "S" curve to the left, but it's smoother and might be okay.
Anyway, I cut an O42 curve in half (close anyway) and inserted a straight to avoid the"S", then lined everything up to close the loop. One thing to avoid is using too many flex tracks and bending them too tight. I don't know what size curves your equipment is or will be rated for, but that flex is awfully close to O32. Even though my equipment is rated for O31, I use O36 for a minimum. When designing, I try to get close with as large of curves as possible, then I either cut them or delete them and close the gap with a flex. That way I know it won't end up being too tight.
John,you are on th right track with a program like Scarm. You can also use their module to place a train on your layout to see it work. I spent about 6 months planning before I ordered track.
Also, remember to create a theme (s) or a storyline in your plan. If you don't, you will get bored and use your new layout to test new engines and shut it off. I would also consider a trip to York to see what is available for you to incorporate.
One more piece of input. Consider adding a 4 way or something to park about 3 or 4 engines or locomotives. They are heavy and sometimes delicate. Best to minimize handling.
like others on the forum, I could go on and on. One more thing. Do not ballast until your layout wiring is complete, dead nuts sure. Run your layout without ballast do r a f e will months to m a key sure you are satisfied. It is your layout and creativity. "To thine own self, be true". Good luck. You will be a kid again. It's fun.