Building an 11 x 14 U-shaped N-Scale layout. I'm using code 80 Atlas Snap track. All the track is down, and I'm using an MRC Prodigy Elite 10amp DCC system. I did not solder the track. I have stringers down, but when trying to run my Kato EMD SD70M with a TCS K1D4 decoder, I get stutter starts...