I run a Tekin Brushless with my Proline beadlock's and the hold just fine. If you ever have to put tires on those rims you'll see that those tires aren't going anywhere!
I'm gonna buy these in about 20 minutes, after I finish writing an essay.
Have some Pro-Line Switches that I have on some other tires, that started cracking, shouldn't be too hard to switch them. (Haha, switch, get it? It's a pun...)