DJM 3" Spindle ?'s

[jermasaurus]

So I ordered the DJM 3" spindles and the Flip Kit. I was just wondering if anyone that has used these can post about any problems they ran into. I read somewhere that grinding at the caliper may be necessary with 15" wheels. Well... I have the 15" wheels, and I am hoping this will go smooth.
If anyone has had any problems please post it and let me know.
Any before and after pictures would be nice too, just to get an idea of how the truck may look. I am planning to do drop it 4/5.

Thanks