I wanted to see if anyone can help me. Apparently, the original armature (114960) is no longer available for the 505-S7 models. Everywhere I look, the 114967 is the intended replacement currently available. So, I purchased and received the armature today. It is very similar, but the electromagnetic portion is slightly shorter and the commutator is shifted a little closer to the end of the shaft, such that the brushes would still contact the contacts but close to the inner edge. Nowhere can I find...can the armature be installed without further modification? The shaft dimensions are identical to the original armature shaft. The armature overall diameter is the same as the old one, too. In other words, it fits in the field.