I recieved my Centech harness today and in the manual it states very clearly not to mount the fuse box to a metal surface... If I were keeping the factory glovebox this wouldnt be a problem, but I decided to go with the Tuffy Lockbox. Though I have not ordered it yet I was curious on what others have done, what is the inside of the Tuffy made of? or should I try to find a different place to mount the fuses, which may be hard because pretty much every thing under the dash is metal.......