I have a silicone one for my nano, I rarely ever take it out of the case. Even though it looks shit with the silicone casing it would just get decked and scratched. I don't like any cases but the silicone ones. They can take a good drop or 2 and the clickwheel is still really accesable. If you'r going to buy a silicone case then most of the ones on ebay are a bag of wank I bought two cheap ones for £2 each and they fit wonky.
So if I wanted a flesh tunnel, I would start off with a standard piercing? Then have it stretched. How long does each stage take how do you know when it's properly healed to raise it another level?
If I was to get a flesh tunnel, whats the largest I could stretch it to without it leaving permanent damage. E.g. I decided I no longer wanted one after a year or two and wanted to take it out and have it heal up completly. Cheers, Adam