After further reading of the Ogauge Companion I now have track 1 (outer loop) on power dist. 1. and the inner loop on power dist. 2.
Dist. 1 has 5 blocks and dist. 2 has 6 blocks. I realized I didn't connect the wiring to blocks A and B in sequence advised by Barry. This 6x18 carpet central layout is very temporary. So I didn't change the wiring to the sequential order (1 to A, 2 to B, 3 to A, etc.). But the engines are running fine. When I will have the larger "on bench workout" layout I will do so. When I power track (power dist.) 1 with the Z4000 handle on the left side I get readings on both handles without moving the handle for track (power dist.) 2. But also I set the track 2 handle to 18 volts anyway. I also did not insulate the blocks. ...just the power districts for now. I did all this as a learning process for the intended 12x24 on bench layout. So are both handles supposed to give readings when only the track(power dist.) 1 handle is moved? Should I set both handles to 18 volts?