I found an easy, accurate, quick way to 'Phase' transformers.  It's not the 'spark' method, but another one that checks voltage between connected transformers.  My question is: When I connect all the Base Posts into one, common circuit (buss), can the voltage of one transformer in the group affect the voltage(s) in any other transformer in the group.  In other words, if one transformer is set at, say 18 volts and another one - in the connected group - is set to only, say 15 volts, will the 18 volt transformer cause the output of the 15 volt transformer to change (i.e., increase)?
 

 F.Y.I.  Depending upon the answer to this question, I'm planning on connecting ALL the Base Posts of ALL the transformers on my layout together.  Some transformer outputs will be connected to Lionel's TMCC, another to the SHS 'LocoMatic' controller (the TMCC and 'LocoMatic' may very well be connected on the same output per Carl Tuveson's method), a plain old AF transformer for ancient AF locos, etc.  I'm also planning on using a smaller AF transformer (also connected to the common Base Post buss) to power the switches on the layout.  By using the common Base Post buss, I can reduce the wiring required for the switches since the Base Post connection will be nearby.
 

 Inquiring mind needs to know.  Thanks!  :-)
 

 Regards, Randy Griggs