Tool box 5th wheel clearance

i just installed a tool box on my truck. I got a box that has a slim top to it just because I was worried that there would not be enough clearance between my trailer and the tool box.



I have not tried hooking it up yet as i've just put it on this morning.



My question is. Has anyone had any clearance problems with there tool box. I forgot to mention that I have a short wheel base.



Also. How much clearance is there from the bottom of your RV to the top of the bed.