RPG Rear Bumper Frame Cut Dimensions

Does anyone know the dimensions of the cut that is taken from the frame when putting on the Rear Raceline Bumper? I have had a hard time getting hold of anyone at RPG to talk for the last couple days.

The reason for being impatient is that I am having some work done on my truck tomorrow and would like for the frame to be cut accordingly while I am there.

Thanks in advance for any help.

search on youtube... i know RPG has a video of the cuts needed to be made and explain the exact dimensions...

---------- Post added at 01:07 AM ---------- Previous post was at 01:07 AM ----------

Race Line Bumper Frame Mod - YouTube

here it is...

sorry that post was for the front bumper... heres a thread for the rear... very simple just tape off to keep the lines straight and then cut and grind off the sharp edges...
http://www.fordraptorforum.com/f98/new-rear-bumper-dovetail-28875/

Thank you for the thread link. I appreciate it.