It's possible to use the arm with a slightly shorter spindle-to-pivot distance, but the standard geometry for the arm will not work. A new geometry and alignment system has to be generated. There is a geometry generator on vinylengine.com .
Will that setup work as good as the one designed for the arm? Maybe. Will it be as easy to set up as the stock alignment? Probably not (IMO, 95%+ probability of being more difficult).
Will that setup work as good as the one designed for the arm? Maybe. Will it be as easy to set up as the stock alignment? Probably not (IMO, 95%+ probability of being more difficult).