Voltage Drop

Hi Everyone.
I routed and copper taped a three lane track. This is my first try at it so the tape broke two times on a lane. I patched the break by putting another piece of tape over the broken section and using the knife tip to tap through to the tape below. My middle lane, which I did last has no breaks. All cars have more punch and are faster in the middle lane. Power taps have been included around track after the broken sections. Can you think of something that I did wrong or have any hints
Thanks Chris
I routed and copper taped a three lane track. This is my first try at it so the tape broke two times on a lane. I patched the break by putting another piece of tape over the broken section and using the knife tip to tap through to the tape below. My middle lane, which I did last has no breaks. All cars have more punch and are faster in the middle lane. Power taps have been included around track after the broken sections. Can you think of something that I did wrong or have any hints
Thanks Chris