craftgrrl | Marble Magnets - Frustration, and Questions

Alright, here's my problem. I have the marbles. I have cut out images with an x-acto (sp?) knife at 1/2". They are the perfect size, but obviously cutting them out using the knife does not look professional. I have looked everywhere I can think of locally (JoAnn's, Hobby Lobby, Michaels, Walmart, Office Max), to no avail. I am making these to sell at a convention next (not this) weekend. I don't have time to order something online (and all my fiancee could find online was in bulk anyway). Where or how can I find a single 1/2" circle cutter? Didn't they used to be everywhere?

I am using non-pearlized flat marbles, the kind that are sold in the floral section of any craft store. I am using E6000 glue. I am using 1/2" magnets, because 3/4" magnets were too large and I can't find anything between the two sizes. However, the 1/2" magnets are really far too small, even though the images are perfect at that size. Thus, these don't look nearly as professional as I would like. Do you ladies (and gents) have any suggestions as to that issue?

The images I am using are images I have collaged together in Photoshop, burned onto CD, and run to Walmart's photo center so that I can get inexpensive photo quality prints. Much better than anything my printer can spit out, more than likely, and cheaper for me than using all that ink. Ink I'm saving to print stickers and sheet magnets that I will also be selling at the convention, after all. ^_^

I bought the E6000 glue for the marble magnets, but am thankful I had it. I made clay horns, and was having a PAIN of a time keeping them on the hair clips I am working with. Someone recommended that I use the E6000 glue, and now it seems I will (thankfully) be able to sell the horns after all. That was quite the relief. Thought I would mention it here, in case anyone is in a similar situation. I was previously using hot glue, which continually peeled away from both the clay and the metal of the clips.

I haven't made many clay charms, or baked the ones I have made, so I'm not sure if that project will work. Though I would love opinions on the ideas. Small, matching clay charms dangling from the end of french hook earrings, with glass beads accenting above? Sound reasonable/functional, or no? I'm using jewelry findings for the loops at the top of each dangly/bead/charm I make out of clay, baked directly into the clay.

And I'm rambling. I'm sorry. Once I have some pieces finished, I'll come over here and post up pictures to get opinions. Hopefully I finish everything in time. ::flails::