I agree , I so want to not make mistakes, in HFSS the most issue for me is the right definition of ports and boundaries for each situation
In Momentum I'm not sure I'm doing right all the pec box and what if I'm not using it at all around the model? and should I use and draw line for drawing lines or I can draw rectangulares , should I use RF simulation or Momentum , should I use dot port or edged , should I put the port on the edge line or in some dot inside the line etc. many little questions that there no where to find the answers...