I wont sugar coat it for you, if you want to build a bobber/chop you have to expect to get some cop attention. It's just part of the game. It doesn't matter if your bike adheres to the modification guide or not I can tell you now, you are guilty until you prove your innocence in NSW.
My chopper would get constantly harassed particularly by Eastern Sydney HWP. I couldn't go a ride without a "RBT" As soon as they found out the bike was pre ADR they got the shits and let me on my way.
If you don't want police attention leave your bike stock as a rock, if you want to modify, expect to play the game.