Mine is on top, and have not had any probs, I am sure that is what the instructions said to do, unless I went by the Zukiworld info. No probs though Kreg is running the same way as well, and know with the winch and Calmini front bumper, I am going to have to put in spacers as it is starting to rub on 32's.
Mac
I think I gave my instructions to Kreg, but I am sure the Calmini instruction said to go over top, perhaps Calmini has changed the install, I did have some problems until the winch and bumper went in.
Curious who is running on top and who has theirs on the bottom?