I would think that these could be used as your initial rings as long as they were put in at the time of the piercing. As far as taking them out for a few hours I think that's gonna be a ways down the road. Until the holes are healed they will want to close up at any opportunity so the first rings are going to have to be in constantly for a while (is it 6 weeks?). These are some neat looking rings, though. I think I'm going to look into them since I have abandoned my tunneling operation.
P. S.: Where do they sell these? Do you have a link?