If it is important to you then doing a search is not a big deal. If you just want to argue, as I suspect most folks who weigh in on this topic do, then it is easy to kill the messenger. Even though the entire text of the supreme court ruling, and the BTAF findings etc. have been on this board several times since October 2003 when I started coming here, folks who refer to that have been maligned by those who choose to disreguard the warnings of others. The mantra seems to be a mix of "They wouldn't be able to sell it if converting it was illegal" and "if the local cops don't know the federal firearms law who is going to catch me." Both answers are an abdication of personal responsibility.
Speaking only for myself it has gotten to the point where I no longer care. In fact, I hope one of the know it alls winds up in court on the federal firearms charges that will happen eventually. Then we can have a court case to refer to that settles this issue once and for all.
Consider me tired of the arguement...