| | Re: Ok...how bad is this...really.
This happens in business all the time. Yes, this is a more personal business, but it's business none-the-less. There is nothing wrong with reverse engineering something and making your own similar product. As long as you make it, you can sell it, and there's nothing wrong with that.
Like many PPs have stated, I'd be inclined to put my own spin on it, but either way there's nothing wrong with it. There are many people selling similar products out there, that's how it works... Also, if it's really cool chances are this person isn't the first person to make it.