Cutting holes How do I use the attachments?

My Dremel 300 came without any instructions, so I had to puzzle out how to use the circle cutter. None of the images I managed to find on the Web or elsewhere were any help. I directed my attention to the "spike" on the circle cutter, and eventually I realized that it was on the wrong (top) side of the cutter--perhaps for safety's sake. When I removed it and positioned it on the bottom side of the cutter, things became clearer. The next thing was to locate the correct cutting edge. I had never used Dremel before, so I didn't recognize the cutting "bit", since it looked like a drill bit. The final problem was how to attach the circle cutter to the Dremel tool. I couldn't see any way of fixing the cutter to the tool. I thought perhaps there was something missing--a connector, perhaps. Eventually I found a reference on the Web to "removing the cap" on the tool. I hadn't noticed a "cap", but when I gave it a turn, it began to unscrew, so I knew I was in business. Finally II tried the attachment out on a piece of scrap timber, I found that it worked. A simple instruction manual would have saved me a lot of time. Also, I now discover that the Dremel 400 would be much more useful than the 300. Dremel don't seem to be very customer friendly. I can access the US site, but the UK and Germany website won't let me in!