Thank you. Bob, yes I am really glad I connected the upper and lower levels. It doubles the time it takes to do a lap no matter what size the layout is. I did this on a layout my son and I built back in 2004 and I was sold. That layout was 8 ft. x 13 ft., but we still managed to run 2 trains simultaneously on a single main, folded over dog bone.
Roll the dice: The turntable is an old 26 inch diameter Bowser TT. I have redone the drive, but it's on the list to re-do the drive again. Cut a new Drive disk for underneath, right now there's a low HP 12 VDC motor and fine tooth drive belt wrapping the disc, so it's working OK. Not long after I sourced & installed that small drive motor and toothed aluminum pulleys, I located a used Dayton 12 VDC drive motor with built in gearbox, just haven't found the time to work on that. I scratch built the deck, the fence rails and the arch, still have to install the deck boards on the walkway.... someday that'll get done.