The whole rivet issue is interesting.... every game needs them, but a press is just expensive enough that it's impossible to justify. I like the idea of the pressless rivets as sold by pinbits, but I hope others had better luck with them than I.
I went through most of a packet trying to get them to hold properly. It took some effort to get the feel of installation, but in the end while most were installed very straight, I found little cuts in the many of the clips, which does no good, and even those which looked like a perfect install could be slid out with my thumb. It may have been my lack of installation prowess, but ultimately if they are as touchy as they appear to be, I think I'm back to begging for use of someone else's press, for lack of confidence they will ever hold properly.