N scale turntable

[ham99]

I have an Atlas turntable that will not maintain electrical contact. I often have to jiggle or press down on it to get a locomotive across it. [1] Is there some way to improve electrical contact? [2] Would the Walthers 120' turntable provide better electrical contact? [3] Would the Walthers turntable line up with the stalls in the Atlas roundhouse, and if so, what would be the distance from the rim of the turntable to the back wall of the Atlas roundhouse? I am really cramped for space in this section of my layout.