Welcome Mike from SE Arizona. The Dremel is old so the problems are more probably the machine rather than you. I see nothing wrong with getting a WEN3921-16 IF you are unsure about whether you want to pursue this hobby/stress reliever or not. That model supposedly takes both pin-less and pinned blades. And it is not a major investment. But according to Wen, it's length of stroke is a tad over a half inch so it will be a little slow. If on the other hand, you are showing a modicum of enthusiasm, the Hegner might be a better investment in the long term. Worth checking it out in person and 'kicking the tires' if the current owner allows it.