BGA can be handled using an oven or a smd reworking station. The critical part is the amount of paste that is to be under the part. It must be very even and the quantity is critical. The part must be seated on the paste without disturbing its thickness and perfectly straight. This means do not use manual applicator. Peter -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics