yes handheld jigsaw. I DO value your opinions, but I have to work with the tools I have. Of course I drew out the taillight first, is there another way? I could not cut the radius straight and smooth on the 3/16 plate with the jigsaw it's just too thick and too small a radius. To make a guide plate would have been easier than cutting out the pattern without one obviously, but still I would have had to cut it as close as I could and then grind it down to be smooth and straight all the way around. The opening after I cut it was not big enough to fit my 4 1/2" angle grinder into and grind down smooth. I was able to do so to the lengths, but for the radius I could not get the angle grinder to fit in there to do so. I have no flap disc and I have no other tool or attachment to get in there other than a hand file and I'm not going to do that. So I did what I had to do with what I had available because I'm not in the position to go buy any new tools right now and when you're in the middle of working on something, it sucks to have to leave and go buy stuff and sometimes you can't when it 12:30 at night, so I come up with a solution that in my opinion is better than free-handing a cut, is just as durable, took less time and looks cleaner and saved me from having to buy something. Isn't that what it's all about? Doing what you can, with what you got? This is what worked for me, how boring it would be to read everyone's build thread if we all did everything the same.