After attempting to run my engine from the approach track onto the finished build Atlas N scale turntable I carefully wired I found I my engine would stall immediately trying to run onto the turntable. A quick check with a volt meter revealed no power to either rail of the turntable even though the transformer was properly wired to the two screw terminals. A closer examination revealed the two spring loaded studs under each rail ohmed fine to each terminal but made no real physical contact with the rail directly above each stud. Weak springs? Who knows but regardless I decided to solder the outside of each rail directly to the each stud and solved the problem immediately with perfect rail voltage every time regardless of the rotated positions....perfect and bullet proof. Just be sure to keep the little stud level under each rail as you solder them as you don't want them to lose the spring under them. I used a toothpick tip to "steady" the inside rail side of the stud while I soldered the outside rail to each stud.I soldered the outside rail to each stud.