If one feels like Markus's book sufficiently documents it (I have not read his book, sorry) and you can get it to work, all power to you.

>Would the FFC not be sufficient for a medium-sized project? I'm sure that the commercial frameworks are much richer, but I thought they might be overkill for some things. If I were to really learn a big framework, I would have to buy it myself, and then probably not be able to use it, since I'm not going to be an independent contractor any time soon. What are the shortcomings of the FFC?
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>I have been reading Markus Egger's OOP book, which praises the FFC (except for the documentation, which his book provides) and says he incorproated many of its classes into his own framework (mining the code, as you say).