I finally tried the floating breeder box trick. I was able to put the entire small rock that my nem got on, into the breeder box, then caught my clowns, and put them in the breeder box with them. I gently did this, and watched the entire process, because if clowns aren't used to the sting, then they could potentially get eaten. Long story short, I had 2 true perculas (tank raised), a GBTA. Within 3 hours, they were hosting. Upon replacement to the tank, they didn't immediately go back to the GBTA, but the next morning, they where all over it.
this really does work, but like most will tell ya, becareful, you will be stressing both the nem and the clowns during this process.
additional info:
I waited 3 months before finally doing this.
once I did it, it took about 3 hours.
Results: never ending bouncing and dancing with my nem.