new sub box tips apreciated

this is a project i had another topic on but being long ago i could not find it  and not i finally finished it... im 16 and looking to start this fiberglass stuff and this is my first project and in stall... in the pictures you will see the amp and the spare tire i am going to make a cover for the tire with a flat front probably and mount the amps to that.. but it needs to be removeable any tips on that project would be helpful. leave feedback and tell me what you think.. thanks

i will put up some more pictures later