kinds

I've been wanting to put rearsets on my bike for a long time and I have done quite a bit of looking and have found quite a few different kinds/styles. Anyway, here are a bunch of pics of different rearsets. PM me if you want a higher quality image (I compressed these to save on file space). Jeff

I'm in need of some help... Every carb top on my bike has a screw that looks like this... How the heck do I get those out? I was thinking of drilling it out but then the little voice in my mind said no. Are there bits I could get to remove these? If so, what are they called?