Hi there. I bought a used Felt cruiser from a friend for 100$ about a year ago. Like this one http://up.picr.de/9945818eig.jpg It had a problem with the rear wheel so I couldn't even try it, but I liked it so I took it. I had a colleague at work who knew about hubs, (having lived in Holland) and he explained to me how to fix the wheel, it turned out it just had to be set correctly. I only had experience with dirt cheap MTBs and I knew how to change a tube, how to replace a stem and basically that was it. Little I knew how would I have to read till I got the bike to be how I wanted it to be. I fixed the wheel, the play had to be correctly set and it was done. The more I rode it the more I saw where it was lacking. It was heavy so I decided to put a motor on it, the ride was too hard for me so I wanted to have a fork with suspension, another seat, I wanted to sit lower and further back, I wanted other brakes, I wanted to get rid of the coaster brake. The problem was that everytime I went to the local shop they were telling me to forget about it, it was impossible they said. They even told me my wheel was screwed and that I needed a nw wheel. I had already found some builds googling at saw that anything could be done. I found a shop that did my wheels, they laced me new hubs and installed the brakes. At another shop I got me an used suspension fork. Those were the two shops in the area that claimed to do some custom work. Thanks, guys. The others shop owners were mostly incompetent, one of them told me my seat post is obviously custom made and I would have to go to a cruiser shop. I was ready to go postal on the morons at my village when I explicitely asked for a chain for a single speed, and explicitely stated that I need to make a chain longer so I need not just to work, but to be hte same correctly showing to the "7,8,9s" inscripment on the package and I was still given the thinner chain for a MTB. Facepalm and kill'em all. So in the end I learned that I can't expect any assistance, they just wanted to change tires, fix brakes and sell their complete bikes. Anyway, that's the end result. I am not gonna lie, had I known how much work would it be for a noob who lacks the experience, knowledge and tools I would have probably never started.