Sorry I am so late here, for some reason a few months ago I stopped getting email notifications in my email unless I go and press subscribe twice, normally if I respond to a thread it subscribes by itself. But yeah get that SECOND one there in the picture if it's a bigger panel. It is good. The first one is good for more rounded out panels. So if your panel has a bit of shapes, etc then the first one is good, if it's more flat then the second will do. For the die grinder, look for a plain electric one with a cutoff (flat disk) wheel. No hard rock like grinder thing, just a cutoff wheel.