H155i Pro RGB, FD Define R4 Case Question.

[Rx4speed]

I'm considering the H115i Pro RGB for front mount in my Define R4 case. I know the original H115i fits with some small modding to the HDD cages.

 

However, it looks like the vertical dimension from the bottom of the radiator (tubeless end) to the first threaded RAD hole may be longer on the PRO RGB.

 

The original h115i clears the bottom of the case, but not by much. Any current owners care to grab that dimension for me?

 

If it won't fit, then it's the H100i Pro or the NH-D15.