Reverse Loop Gaps and Power Booster for my layout question

Ian Cole
 

Greetings all!  I just finished the the benchwork and beginning the track laying and wiring on my new layout.  HO Scale, using NCE DCC (PH-PRO 5AMP).  In the photo linked I've marked with red lines where I feel I need to put in gaps and ARUs to avoid shorts.  Do these look like the best spots?  Also, would I be better served isolating the whole yard/turntable area and putting in a power booster?  For reference, bottom table is 21', right table 13', top table 14'.
 
Link to the photo of my layout: http://tinypic.com/r/15gf6ol/9
 
Thanks in advance for any advice!
 
Ian

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