If 35x is sufficient, and you want to take snapshots or run video directly to your PC, how about one of these?
http://tinyurl.com/zscope
USB linked and easy to use, and since you use your monitor instead of the actual optics you may actually be able to see the edges even better. Or is my thinking way off on this subject?
It's the cheapest low-power USB scope I've seen. I don't own one, but it looks like it would work for edge viewing rather well.