I have a Gimme large caged skeleton prop that quit working on me a few years ago. This year I deceided that I was going to get him to do something so I wired up his led eyes and the motor that makes him shake. It works well, but my question is...

The power supply died on me last year (before I rewired him). It was a 9v 2000ma supply. I have been using a 12v 500ma and a 10v 700ma supply and both work well, but Im not sure what could actualy happen if I let him run for about 3 hours like that. I have only tested him for like 20min continuously and the 12v 500ma supply gets warm. Not to warm to toutch or anything, but enough to make me ask this question. I switched to the 10v 700ma because it was a little closer to the original supply but I have not done enough testing with it to see what happens. I figure I might as well just plug him in on halloween and let it go because if its going to break its going to break. I rather it go on halloween than in my garage testing.

So what do you think will happen using it like this? Am I looking at burning up the prop or just the power supply or both? Will it be Ok with one of these supplys or should I just wait and get a 9v 2000ma supply. The prop will be used out side hanging from a tree away from people so it should not cause any danger if something went wrong, but I just wanted to hear what others thought about using other supplys in this way because Im not that familiar with volts and amps like this.