the insert point offest + - gets it to the left or right side. study the subassembly help. Its vague but somewhat helpful
sample offset =0 = crown point / alignment (profile optional)
insert offset = the +- distance to you saw cut line
Here is my warning with this sub assemby: you cannot control the eop with a profile it : widen"Match"Slope thats what it does. Being you have a curbed edge that may or maynot workout for you depending on the existing condition grade.
Using the OML2 with a SuprAOR attached gives you flexibility with the eop via profile
Joseph D. Bouza, P.E. (one of 'THOSE' People) Civil 3D 2012 & 2013 HP Z210 Workstation Intel Xeon CPU E31240 @ 3.30 Hz 12 GB Ram
Note: Its all Resistentialism, so keep calm and carry on