I have a skinz bumper that I am going to be installing on my pro. The instructions I have are for mounting it on an IQ. It is pretty straight forward how to mount it but my question is how far back are you guys mounting them? There is no hole in the pro tunnel to line up with the ones in the bumper. I was thinking of measuring the stock bumper from the rear mounting hole to the back of the tube and then mounting the skinz one the some distance. what do you guys think?