Yeah, I'll probably put one inside too. Infact, I originally bought this fuse block to put inside, but then I added all the lights and needed to remove things from my terminal connection. Anywya, I have a couple thigs like my XM tuner that are plugged in with existing fuses inside. I used the add-on fuse holders so they're not TOO bad, but it would be better to have an extra block. I'll probably upgrade my main supply line to heavier wire too; certainly if I add anything else to the block. Just didn't have any here on Sunday. I just can't seem to stop adding electrical stuff to my truck!