i remember my first DIY. my dad owned his own buisness as a carpenter and had this old van. no rear windows, just the driv, pass, and windshield. that old. the stereo did not work so he went and got this cheap ass deck from the auto parts store that came with 2 speakers. the van had one speaker in the dash so i was like shit i will cut some holes in the doors and run some wire. no big deal. i use a saw zall since the doors have no panels and are solid metal and cut the holes. wired it up and screwed it in. Sounded ok for how litle was spend. I turned he ignition off and close the door to see the damage. The blade was too long and you could see where the blade tip hit the outside of the door. there was an outlince of 6 inch circles on the outside of the door. i show my dad and he nearly pissed himself. he told me to screw up once i will learn my lesson to plan it out and use caution to have my projects turn out great. I learned my lesson.